diff --git a/samples/standalone/dsl/http-client/pom.xml b/samples/standalone/dsl/http-client/pom.xml
index ff76a85f73..4788a9983a 100644
--- a/samples/standalone/dsl/http-client/pom.xml
+++ b/samples/standalone/dsl/http-client/pom.xml
@@ -13,7 +13,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.0.M1</version>
+		<version>2.1.0.M4</version>
 		<relativePath />
 	</parent>
 
diff --git a/samples/standalone/pact/pact-http-client/pom.xml b/samples/standalone/pact/pact-http-client/pom.xml
index 725aa64dab..8c5ff404f6 100644
--- a/samples/standalone/pact/pact-http-client/pom.xml
+++ b/samples/standalone/pact/pact-http-client/pom.xml
@@ -13,7 +13,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.0.M1</version>
+		<version>2.1.0.M4</version>
 		<relativePath />
 	</parent>
 
diff --git a/samples/standalone/yml/http-client/pom.xml b/samples/standalone/yml/http-client/pom.xml
index b7c8ad571c..347ba367fb 100644
--- a/samples/standalone/yml/http-client/pom.xml
+++ b/samples/standalone/yml/http-client/pom.xml
@@ -13,7 +13,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.0.M1</version>
+		<version>2.1.0.M4</version>
 		<relativePath />
 	</parent>
 
diff --git a/samples/wiremock-jetty/pom.xml b/samples/wiremock-jetty/pom.xml
index 11ac98b3be..9eca8faa56 100644
--- a/samples/wiremock-jetty/pom.xml
+++ b/samples/wiremock-jetty/pom.xml
@@ -13,7 +13,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.0.M1</version>
+		<version>2.1.0.M4</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/samples/wiremock-native/pom.xml b/samples/wiremock-native/pom.xml
index caab291dcf..1150de6613 100644
--- a/samples/wiremock-native/pom.xml
+++ b/samples/wiremock-native/pom.xml
@@ -13,7 +13,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.0.M1</version>
+		<version>2.1.0.M4</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/samples/wiremock-tomcat/pom.xml b/samples/wiremock-tomcat/pom.xml
index bbbba762b9..d0f5f2eab1 100644
--- a/samples/wiremock-tomcat/pom.xml
+++ b/samples/wiremock-tomcat/pom.xml
@@ -13,7 +13,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.0.M1</version>
+		<version>2.1.0.M4</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/samples/wiremock-undertow-ssl/pom.xml b/samples/wiremock-undertow-ssl/pom.xml
index c7871b2402..26f80d9b48 100644
--- a/samples/wiremock-undertow-ssl/pom.xml
+++ b/samples/wiremock-undertow-ssl/pom.xml
@@ -13,7 +13,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.0.M1</version>
+		<version>2.1.0.M4</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/samples/wiremock-undertow/pom.xml b/samples/wiremock-undertow/pom.xml
index b801ff7b97..e972bb78ec 100644
--- a/samples/wiremock-undertow/pom.xml
+++ b/samples/wiremock-undertow/pom.xml
@@ -13,7 +13,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.0.M1</version>
+		<version>2.1.0.M4</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/complex-configuration/pom.xml b/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/complex-configuration/pom.xml
index 67da284299..7d0c892202 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/complex-configuration/pom.xml
+++ b/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/complex-configuration/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.1.0.M1</version>
+        <version>2.1.0.M4</version>
     </parent>
 
     <dependencies>
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/different-module-configuration/module/pom.xml b/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/different-module-configuration/module/pom.xml
index ed4debccfe..24649fd345 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/different-module-configuration/module/pom.xml
+++ b/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/different-module-configuration/module/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.1.0.M1</version>
+        <version>2.1.0.M4</version>
     </parent>
 
     <dependencies>
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/plugin-extension/pom.xml b/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/plugin-extension/pom.xml
index f857a625f6..06f1bd9d14 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/plugin-extension/pom.xml
+++ b/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/plugin-extension/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.1.0.M1</version>
+        <version>2.1.0.M4</version>
     </parent>
 
     <dependencies>
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-groovy/pom.xml b/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-groovy/pom.xml
index 34e30bccdb..5e24948d6a 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-groovy/pom.xml
+++ b/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-groovy/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.1.0.M1</version>
+        <version>2.1.0.M4</version>
     </parent>
 
     <dependencies>
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-java/pom.xml b/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-java/pom.xml
index ac2ceff8a4..3e4d830897 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-java/pom.xml
+++ b/spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-java/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.1.0.M1</version>
+        <version>2.1.0.M4</version>
     </parent>
 
     <dependencies>