diff --git a/docs/src/test/bats/fixtures/gs-contract-rest/complete/contract-rest-client/pom.xml b/docs/src/test/bats/fixtures/gs-contract-rest/complete/contract-rest-client/pom.xml
index 49c23322..8c4ab245 100644
--- a/docs/src/test/bats/fixtures/gs-contract-rest/complete/contract-rest-client/pom.xml
+++ b/docs/src/test/bats/fixtures/gs-contract-rest/complete/contract-rest-client/pom.xml
@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.3.0.M3</version>
+		<version>2.3.0.M4</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/docs/src/test/bats/fixtures/gs-contract-rest/complete/contract-rest-service/pom.xml b/docs/src/test/bats/fixtures/gs-contract-rest/complete/contract-rest-service/pom.xml
index 9aa6a79e..c400c20e 100644
--- a/docs/src/test/bats/fixtures/gs-contract-rest/complete/contract-rest-service/pom.xml
+++ b/docs/src/test/bats/fixtures/gs-contract-rest/complete/contract-rest-service/pom.xml
@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.3.0.M3</version>
+		<version>2.3.0.M4</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/docs/src/test/bats/fixtures/gs-contract-rest/initial/contract-rest-client/pom.xml b/docs/src/test/bats/fixtures/gs-contract-rest/initial/contract-rest-client/pom.xml
index 49c23322..8c4ab245 100644
--- a/docs/src/test/bats/fixtures/gs-contract-rest/initial/contract-rest-client/pom.xml
+++ b/docs/src/test/bats/fixtures/gs-contract-rest/initial/contract-rest-client/pom.xml
@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.3.0.M3</version>
+		<version>2.3.0.M4</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/docs/src/test/bats/fixtures/gs-contract-rest/initial/contract-rest-service/pom.xml b/docs/src/test/bats/fixtures/gs-contract-rest/initial/contract-rest-service/pom.xml
index f33d53d9..e8d4c9d1 100644
--- a/docs/src/test/bats/fixtures/gs-contract-rest/initial/contract-rest-service/pom.xml
+++ b/docs/src/test/bats/fixtures/gs-contract-rest/initial/contract-rest-service/pom.xml
@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.3.0.M3</version>
+		<version>2.3.0.M4</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/pom.xml b/pom.xml
index 39460d89..e1878a18 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@
 		<maven.compiler.target>${java.version}</maven.compiler.target>
 		<main.basedir>${basedir}</main.basedir>
 		<docs.main>${project.artifactId}</docs.main>
-		<spring-boot.version>2.3.0.M3</spring-boot.version>
+		<spring-boot.version>2.3.0.M4</spring-boot.version>
 		<spring-cloud-build.version>2.3.0.BUILD-SNAPSHOT</spring-cloud-build.version>
 		<docs.resources.dir>${project.build.directory}/build-docs</docs.resources.dir>
 		<refdocs.build.directory>${project.build.directory}/refdocs/</refdocs.build.directory>
diff --git a/spring-cloud-build-dependencies/pom.xml b/spring-cloud-build-dependencies/pom.xml
index 878def03..c5cfa8d7 100644
--- a/spring-cloud-build-dependencies/pom.xml
+++ b/spring-cloud-build-dependencies/pom.xml
@@ -14,12 +14,12 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-dependencies</artifactId>
-		<version>2.3.0.M3</version>
+		<version>2.3.0.M4</version>
 		<relativePath/>
 	</parent>
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<spring-boot.version>2.3.0.M3</spring-boot.version>
+		<spring-boot.version>2.3.0.M4</spring-boot.version>
 	</properties>
 	<build>
 		<plugins>