diff --git a/guides/gs-contract-rest/complete/contract-rest-client/gradle/wrapper/gradle-wrapper.jar b/guides/gs-contract-rest/complete/contract-rest-client/gradle/wrapper/gradle-wrapper.jar
index 87b738cbd0..62d4c05355 100644
Binary files a/guides/gs-contract-rest/complete/contract-rest-client/gradle/wrapper/gradle-wrapper.jar and b/guides/gs-contract-rest/complete/contract-rest-client/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/guides/gs-contract-rest/complete/contract-rest-client/gradle/wrapper/gradle-wrapper.properties b/guides/gs-contract-rest/complete/contract-rest-client/gradle/wrapper/gradle-wrapper.properties
index 290541c738..4c5803d13c 100644
--- a/guides/gs-contract-rest/complete/contract-rest-client/gradle/wrapper/gradle-wrapper.properties
+++ b/guides/gs-contract-rest/complete/contract-rest-client/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/guides/gs-contract-rest/complete/contract-rest-client/gradlew b/guides/gs-contract-rest/complete/contract-rest-client/gradlew
index af6708ff22..fbd7c51583 100755
--- a/guides/gs-contract-rest/complete/contract-rest-client/gradlew
+++ b/guides/gs-contract-rest/complete/contract-rest-client/gradlew
@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -66,6 +82,7 @@ esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -109,10 +126,11 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath
@@ -138,19 +156,19 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -159,14 +177,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"
diff --git a/guides/gs-contract-rest/complete/contract-rest-client/gradlew.bat b/guides/gs-contract-rest/complete/contract-rest-client/gradlew.bat
index 6d57edc706..5093609d51 100644
--- a/guides/gs-contract-rest/complete/contract-rest-client/gradlew.bat
+++ b/guides/gs-contract-rest/complete/contract-rest-client/gradlew.bat
@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -13,8 +29,11 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
@@ -65,6 +84,7 @@ set CMD_LINE_ARGS=%*
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
 "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
 
diff --git a/guides/gs-contract-rest/complete/contract-rest-service/build.gradle b/guides/gs-contract-rest/complete/contract-rest-service/build.gradle
index 0874d6bed2..dd5f5d8a95 100644
--- a/guides/gs-contract-rest/complete/contract-rest-service/build.gradle
+++ b/guides/gs-contract-rest/complete/contract-rest-service/build.gradle
@@ -31,9 +31,9 @@ targetCompatibility = 1.8
 repositories { mavenCentral() }
 
 dependencies {
-	compile('org.springframework.boot:spring-boot-starter-web')
-	testCompile('org.springframework.boot:spring-boot-starter-test')
-	testCompile('org.springframework.cloud:spring-cloud-starter-contract-verifier')
+	implementation('org.springframework.boot:spring-boot-starter-web')
+	testImplementation('org.springframework.boot:spring-boot-starter-test')
+	testImplementation('org.springframework.cloud:spring-cloud-starter-contract-verifier')
 }
 
 dependencyManagement {
@@ -47,4 +47,4 @@ contracts {
 	baseClassMappings {
 		baseClassMapping(".*hello.*", "hello.BaseClass")
 	}
-}
+}
\ No newline at end of file
diff --git a/guides/gs-contract-rest/complete/contract-rest-service/gradle/wrapper/gradle-wrapper.jar b/guides/gs-contract-rest/complete/contract-rest-service/gradle/wrapper/gradle-wrapper.jar
index 6b6ea3ab4f..62d4c05355 100644
Binary files a/guides/gs-contract-rest/complete/contract-rest-service/gradle/wrapper/gradle-wrapper.jar and b/guides/gs-contract-rest/complete/contract-rest-service/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/guides/gs-contract-rest/complete/contract-rest-service/gradle/wrapper/gradle-wrapper.properties b/guides/gs-contract-rest/complete/contract-rest-service/gradle/wrapper/gradle-wrapper.properties
index ea720f986f..4c5803d13c 100644
--- a/guides/gs-contract-rest/complete/contract-rest-service/gradle/wrapper/gradle-wrapper.properties
+++ b/guides/gs-contract-rest/complete/contract-rest-service/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-bin.zip
diff --git a/guides/gs-contract-rest/complete/contract-rest-service/gradlew b/guides/gs-contract-rest/complete/contract-rest-service/gradlew
index cccdd3d517..fbd7c51583 100755
--- a/guides/gs-contract-rest/complete/contract-rest-service/gradlew
+++ b/guides/gs-contract-rest/complete/contract-rest-service/gradlew
@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -66,6 +82,7 @@ esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -109,10 +126,11 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath
@@ -138,19 +156,19 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -159,14 +177,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"
diff --git a/guides/gs-contract-rest/complete/contract-rest-service/gradlew.bat b/guides/gs-contract-rest/complete/contract-rest-service/gradlew.bat
index f9553162f1..5093609d51 100644
--- a/guides/gs-contract-rest/complete/contract-rest-service/gradlew.bat
+++ b/guides/gs-contract-rest/complete/contract-rest-service/gradlew.bat
@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -13,8 +29,11 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
@@ -65,6 +84,7 @@ set CMD_LINE_ARGS=%*
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
 "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
 
diff --git a/guides/gs-contract-rest/complete/gradle/wrapper/gradle-wrapper.jar b/guides/gs-contract-rest/complete/gradle/wrapper/gradle-wrapper.jar
index 87b738cbd0..94336fcae9 100644
Binary files a/guides/gs-contract-rest/complete/gradle/wrapper/gradle-wrapper.jar and b/guides/gs-contract-rest/complete/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/guides/gs-contract-rest/complete/gradle/wrapper/gradle-wrapper.properties b/guides/gs-contract-rest/complete/gradle/wrapper/gradle-wrapper.properties
index 290541c738..4c5803d13c 100644
--- a/guides/gs-contract-rest/complete/gradle/wrapper/gradle-wrapper.properties
+++ b/guides/gs-contract-rest/complete/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/guides/gs-contract-rest/complete/gradlew b/guides/gs-contract-rest/complete/gradlew
index af6708ff22..cccdd3d517 100755
--- a/guides/gs-contract-rest/complete/gradlew
+++ b/guides/gs-contract-rest/complete/gradlew
@@ -28,7 +28,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+DEFAULT_JVM_OPTS=""
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
diff --git a/guides/gs-contract-rest/complete/gradlew.bat b/guides/gs-contract-rest/complete/gradlew.bat
index 6d57edc706..f9553162f1 100644
--- a/guides/gs-contract-rest/complete/gradlew.bat
+++ b/guides/gs-contract-rest/complete/gradlew.bat
@@ -14,7 +14,7 @@ set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS=
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
diff --git a/guides/gs-contract-rest/initial/contract-rest-client/build.gradle b/guides/gs-contract-rest/initial/contract-rest-client/build.gradle
index 9892419e7e..8f3325425b 100644
--- a/guides/gs-contract-rest/initial/contract-rest-client/build.gradle
+++ b/guides/gs-contract-rest/initial/contract-rest-client/build.gradle
@@ -40,3 +40,5 @@ eclipse {
 	}
 }
 
+
+
diff --git a/guides/gs-contract-rest/initial/contract-rest-client/gradle/wrapper/gradle-wrapper.jar b/guides/gs-contract-rest/initial/contract-rest-client/gradle/wrapper/gradle-wrapper.jar
index 87b738cbd0..94336fcae9 100644
Binary files a/guides/gs-contract-rest/initial/contract-rest-client/gradle/wrapper/gradle-wrapper.jar and b/guides/gs-contract-rest/initial/contract-rest-client/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/guides/gs-contract-rest/initial/contract-rest-client/gradle/wrapper/gradle-wrapper.properties b/guides/gs-contract-rest/initial/contract-rest-client/gradle/wrapper/gradle-wrapper.properties
index 290541c738..4c5803d13c 100644
--- a/guides/gs-contract-rest/initial/contract-rest-client/gradle/wrapper/gradle-wrapper.properties
+++ b/guides/gs-contract-rest/initial/contract-rest-client/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/guides/gs-contract-rest/initial/contract-rest-client/gradlew b/guides/gs-contract-rest/initial/contract-rest-client/gradlew
index af6708ff22..cccdd3d517 100755
--- a/guides/gs-contract-rest/initial/contract-rest-client/gradlew
+++ b/guides/gs-contract-rest/initial/contract-rest-client/gradlew
@@ -28,7 +28,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+DEFAULT_JVM_OPTS=""
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
diff --git a/guides/gs-contract-rest/initial/contract-rest-client/gradlew.bat b/guides/gs-contract-rest/initial/contract-rest-client/gradlew.bat
index 6d57edc706..f9553162f1 100644
--- a/guides/gs-contract-rest/initial/contract-rest-client/gradlew.bat
+++ b/guides/gs-contract-rest/initial/contract-rest-client/gradlew.bat
@@ -14,7 +14,7 @@ set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS=
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
diff --git a/guides/gs-contract-rest/initial/contract-rest-service/build.gradle b/guides/gs-contract-rest/initial/contract-rest-service/build.gradle
index 3e99e38fbb..6d047c7f93 100644
--- a/guides/gs-contract-rest/initial/contract-rest-service/build.gradle
+++ b/guides/gs-contract-rest/initial/contract-rest-service/build.gradle
@@ -29,9 +29,9 @@ targetCompatibility = 1.8
 repositories { mavenCentral() }
 
 dependencies {
-	compile('org.springframework.boot:spring-boot-starter-web')
-	testCompile('org.springframework.boot:spring-boot-starter-test')
-	testCompile('org.springframework.cloud:spring-cloud-starter-contract-verifier')
+	implementation('org.springframework.boot:spring-boot-starter-web')
+	testImplementation('org.springframework.boot:spring-boot-starter-test')
+	testImplementation('org.springframework.cloud:spring-cloud-starter-contract-verifier')
 }
 
 dependencyManagement {
@@ -45,4 +45,4 @@ contracts {
 	baseClassMappings {
 		baseClassMapping(".*hello.*", "hello.BaseClass")
 	}
-}
+}
\ No newline at end of file
diff --git a/guides/gs-contract-rest/initial/contract-rest-service/gradle/wrapper/gradle-wrapper.jar b/guides/gs-contract-rest/initial/contract-rest-service/gradle/wrapper/gradle-wrapper.jar
index 87b738cbd0..94336fcae9 100644
Binary files a/guides/gs-contract-rest/initial/contract-rest-service/gradle/wrapper/gradle-wrapper.jar and b/guides/gs-contract-rest/initial/contract-rest-service/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/guides/gs-contract-rest/initial/contract-rest-service/gradle/wrapper/gradle-wrapper.properties b/guides/gs-contract-rest/initial/contract-rest-service/gradle/wrapper/gradle-wrapper.properties
index 290541c738..4c5803d13c 100644
--- a/guides/gs-contract-rest/initial/contract-rest-service/gradle/wrapper/gradle-wrapper.properties
+++ b/guides/gs-contract-rest/initial/contract-rest-service/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/guides/gs-contract-rest/initial/contract-rest-service/gradlew b/guides/gs-contract-rest/initial/contract-rest-service/gradlew
index af6708ff22..cccdd3d517 100755
--- a/guides/gs-contract-rest/initial/contract-rest-service/gradlew
+++ b/guides/gs-contract-rest/initial/contract-rest-service/gradlew
@@ -28,7 +28,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+DEFAULT_JVM_OPTS=""
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
diff --git a/guides/gs-contract-rest/initial/contract-rest-service/gradlew.bat b/guides/gs-contract-rest/initial/contract-rest-service/gradlew.bat
index 6d57edc706..f9553162f1 100644
--- a/guides/gs-contract-rest/initial/contract-rest-service/gradlew.bat
+++ b/guides/gs-contract-rest/initial/contract-rest-service/gradlew.bat
@@ -14,7 +14,7 @@ set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS=
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
diff --git a/guides/gs-contract-rest/initial/gradle/wrapper/gradle-wrapper.jar b/guides/gs-contract-rest/initial/gradle/wrapper/gradle-wrapper.jar
index 87b738cbd0..94336fcae9 100644
Binary files a/guides/gs-contract-rest/initial/gradle/wrapper/gradle-wrapper.jar and b/guides/gs-contract-rest/initial/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/guides/gs-contract-rest/initial/gradle/wrapper/gradle-wrapper.properties b/guides/gs-contract-rest/initial/gradle/wrapper/gradle-wrapper.properties
index 290541c738..4c5803d13c 100644
--- a/guides/gs-contract-rest/initial/gradle/wrapper/gradle-wrapper.properties
+++ b/guides/gs-contract-rest/initial/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/guides/gs-contract-rest/initial/gradlew b/guides/gs-contract-rest/initial/gradlew
index af6708ff22..cccdd3d517 100755
--- a/guides/gs-contract-rest/initial/gradlew
+++ b/guides/gs-contract-rest/initial/gradlew
@@ -28,7 +28,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+DEFAULT_JVM_OPTS=""
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
diff --git a/guides/gs-contract-rest/initial/gradlew.bat b/guides/gs-contract-rest/initial/gradlew.bat
index 6d57edc706..f9553162f1 100644
--- a/guides/gs-contract-rest/initial/gradlew.bat
+++ b/guides/gs-contract-rest/initial/gradlew.bat
@@ -14,7 +14,7 @@ set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS=
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
diff --git a/samples/standalone/dsl/http-client/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/dsl/http-client/gradle/wrapper/gradle-wrapper.properties
index a4b4429748..4c5803d13c 100644
--- a/samples/standalone/dsl/http-client/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/dsl/http-client/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/dsl/http-server/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/dsl/http-server/gradle/wrapper/gradle-wrapper.properties
index a4b4429748..4c5803d13c 100644
--- a/samples/standalone/dsl/http-server/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/dsl/http-server/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/restdocs/http-client/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/restdocs/http-client/gradle/wrapper/gradle-wrapper.properties
index a4b4429748..4c5803d13c 100644
--- a/samples/standalone/restdocs/http-client/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/restdocs/http-client/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/restdocs/http-server/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/restdocs/http-server/gradle/wrapper/gradle-wrapper.properties
index a4b4429748..4c5803d13c 100644
--- a/samples/standalone/restdocs/http-server/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/restdocs/http-server/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/webclient/http-client/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/webclient/http-client/gradle/wrapper/gradle-wrapper.properties
index a4b4429748..4c5803d13c 100644
--- a/samples/standalone/webclient/http-client/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/webclient/http-client/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/webclient/http-server/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/webclient/http-server/gradle/wrapper/gradle-wrapper.properties
index a4b4429748..4c5803d13c 100644
--- a/samples/standalone/webclient/http-server/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/webclient/http-server/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/gradle/wrapper/gradle-wrapper.properties b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/gradle/wrapper/gradle-wrapper.properties
index a4b4429748..4c5803d13c 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/gradle/wrapper/gradle-wrapper.properties
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradle/wrapper/gradle-wrapper.properties b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradle/wrapper/gradle-wrapper.properties
index a4b4429748..4c5803d13c 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradle/wrapper/gradle-wrapper.properties
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradlew b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradlew
index af6708ff22..2fe81a7d95 100755
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradlew
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradlew
@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -109,8 +125,8 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
     JAVACMD=`cygpath --unix "$JAVACMD"`
@@ -138,19 +154,19 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -159,14 +175,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradlew.bat b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradlew.bat
index 0f8d5937c4..9109989e3c 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradlew.bat
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/bootSimple/gradlew.bat
@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -13,8 +29,11 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradle/wrapper/gradle-wrapper.properties b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradle/wrapper/gradle-wrapper.properties
index a4b4429748..4c5803d13c 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradle/wrapper/gradle-wrapper.properties
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradlew b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradlew
index af6708ff22..2fe81a7d95 100755
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradlew
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradlew
@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -109,8 +125,8 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
     JAVACMD=`cygpath --unix "$JAVACMD"`
@@ -138,19 +154,19 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -159,14 +175,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradlew.bat b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradlew.bat
index 0f8d5937c4..9109989e3c 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradlew.bat
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradlew.bat
@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -13,8 +29,11 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradle/wrapper/gradle-wrapper.properties b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradle/wrapper/gradle-wrapper.properties
index a4b4429748..4c5803d13c 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradle/wrapper/gradle-wrapper.properties
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradlew b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradlew
old mode 100644
new mode 100755
index af6708ff22..2fe81a7d95
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradlew
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradlew
@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -109,8 +125,8 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
     JAVACMD=`cygpath --unix "$JAVACMD"`
@@ -138,19 +154,19 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -159,14 +175,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradlew.bat b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradlew.bat
index 6d57edc706..62bd9b9cce 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradlew.bat
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradlew.bat
@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -13,8 +29,11 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
diff --git a/src/checkstyle/checkstyle-suppressions.xml b/src/checkstyle/checkstyle-suppressions.xml
index 355b31863a..b7ce3e5708 100644
--- a/src/checkstyle/checkstyle-suppressions.xml
+++ b/src/checkstyle/checkstyle-suppressions.xml
@@ -47,4 +47,5 @@
 	<suppress files=".*HttpStatus.*" checks="HideUtility*"/>
 	<suppress files=".*contractsToCompile.*" checks=".*"/>
 	<suppress files=".*RegexPatterns.*" checks="HideUtility*"/>
+	<suppress files=".*gradle.*" checks=".*"/>
 </suppressions>