diff --git a/docker/spring-cloud-contract-docker/project/build.gradle b/docker/spring-cloud-contract-docker/project/build.gradle
index 1c9960326e..a28ea04d6d 100644
--- a/docker/spring-cloud-contract-docker/project/build.gradle
+++ b/docker/spring-cloud-contract-docker/project/build.gradle
@@ -91,10 +91,6 @@ contracts {
 	}
 }
 
-task wrapper(type: Wrapper) {
-	gradleVersion = '4.9'
-}
-
 task cleanOutput(type: Delete) {
 	def dirName = "/spring-cloud-contract-output"
 	file(dirName).list().each {
diff --git a/docker/spring-cloud-contract-docker/project/gradle/wrapper/gradle-wrapper.jar b/docker/spring-cloud-contract-docker/project/gradle/wrapper/gradle-wrapper.jar
index 29953ea141..87b738cbd0 100644
Binary files a/docker/spring-cloud-contract-docker/project/gradle/wrapper/gradle-wrapper.jar and b/docker/spring-cloud-contract-docker/project/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/docker/spring-cloud-contract-docker/project/gradle/wrapper/gradle-wrapper.properties b/docker/spring-cloud-contract-docker/project/gradle/wrapper/gradle-wrapper.properties
index e0b3fb8d70..b0acbdcd73 100644
--- a/docker/spring-cloud-contract-docker/project/gradle/wrapper/gradle-wrapper.properties
+++ b/docker/spring-cloud-contract-docker/project/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/docker/spring-cloud-contract-docker/project/gradlew b/docker/spring-cloud-contract-docker/project/gradlew
index cccdd3d517..af6708ff22 100755
--- a/docker/spring-cloud-contract-docker/project/gradlew
+++ b/docker/spring-cloud-contract-docker/project/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=""
+DEFAULT_JVM_OPTS='"-Xmx64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
diff --git a/docker/spring-cloud-contract-docker/project/gradlew.bat b/docker/spring-cloud-contract-docker/project/gradlew.bat
index e95643d6a2..0f8d5937c4 100644
--- a/docker/spring-cloud-contract-docker/project/gradlew.bat
+++ b/docker/spring-cloud-contract-docker/project/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=
+set DEFAULT_JVM_OPTS="-Xmx64m"
 
 @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 f4d7b2bf61..b0acbdcd73 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-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-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 f4d7b2bf61..b0acbdcd73 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-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/messaging/stream-sink/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/messaging/stream-sink/gradle/wrapper/gradle-wrapper.properties
index f4d7b2bf61..b0acbdcd73 100644
--- a/samples/standalone/messaging/stream-sink/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/messaging/stream-sink/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/messaging/stream-source/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/messaging/stream-source/gradle/wrapper/gradle-wrapper.properties
index f4d7b2bf61..b0acbdcd73 100644
--- a/samples/standalone/messaging/stream-source/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/messaging/stream-source/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/pact/pact-http-client/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/pact/pact-http-client/gradle/wrapper/gradle-wrapper.properties
index f4d7b2bf61..b0acbdcd73 100644
--- a/samples/standalone/pact/pact-http-client/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/pact/pact-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-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/pact/pact-http-server/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/pact/pact-http-server/gradle/wrapper/gradle-wrapper.properties
index f4d7b2bf61..b0acbdcd73 100644
--- a/samples/standalone/pact/pact-http-server/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/pact/pact-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-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-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 f4d7b2bf61..b0acbdcd73 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-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-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 f4d7b2bf61..b0acbdcd73 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-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/webclient/http-client/gradle/wrapper/gradle-wrapper.jar b/samples/standalone/webclient/http-client/gradle/wrapper/gradle-wrapper.jar
index 1948b9074f..87b738cbd0 100644
Binary files a/samples/standalone/webclient/http-client/gradle/wrapper/gradle-wrapper.jar and b/samples/standalone/webclient/http-client/gradle/wrapper/gradle-wrapper.jar differ
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 e0b3fb8d70..b0acbdcd73 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-4.10.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/webclient/http-client/gradlew b/samples/standalone/webclient/http-client/gradlew
index cccdd3d517..af6708ff22 100755
--- a/samples/standalone/webclient/http-client/gradlew
+++ b/samples/standalone/webclient/http-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=""
+DEFAULT_JVM_OPTS='"-Xmx64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
diff --git a/samples/standalone/webclient/http-client/gradlew.bat b/samples/standalone/webclient/http-client/gradlew.bat
index e95643d6a2..0f8d5937c4 100644
--- a/samples/standalone/webclient/http-client/gradlew.bat
+++ b/samples/standalone/webclient/http-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=
+set DEFAULT_JVM_OPTS="-Xmx64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
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 f4d7b2bf61..b0acbdcd73 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-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/yml/http-client/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/yml/http-client/gradle/wrapper/gradle-wrapper.properties
index f4d7b2bf61..b0acbdcd73 100644
--- a/samples/standalone/yml/http-client/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/yml/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-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/samples/standalone/yml/http-server/gradle/wrapper/gradle-wrapper.properties b/samples/standalone/yml/http-server/gradle/wrapper/gradle-wrapper.properties
index f4d7b2bf61..b0acbdcd73 100644
--- a/samples/standalone/yml/http-server/gradle/wrapper/gradle-wrapper.properties
+++ b/samples/standalone/yml/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-5.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists