diff --git a/docker/spring-cloud-contract-docker/project/gradle.properties b/docker/spring-cloud-contract-docker/project/gradle.properties
index 0b95fcc480..3a250f5610 100644
--- a/docker/spring-cloud-contract-docker/project/gradle.properties
+++ b/docker/spring-cloud-contract-docker/project/gradle.properties
@@ -1,4 +1,4 @@
 org.gradle.daemon=false
 verifierVersion=3.1.2-SNAPSHOT
-springBootVersion=2.6.7
+springBootVersion=2.6.6
 camelVersion=3.11.0
\ No newline at end of file
diff --git a/guides/gs-contract-rest/complete/contract-rest-client/pom.xml b/guides/gs-contract-rest/complete/contract-rest-client/pom.xml
index 71d4dbeca1..685e37e987 100644
--- a/guides/gs-contract-rest/complete/contract-rest-client/pom.xml
+++ b/guides/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>2.6.7</version>
+		<version>2.6.6</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/guides/gs-contract-rest/complete/contract-rest-service/pom.xml b/guides/gs-contract-rest/complete/contract-rest-service/pom.xml
index 59e20765b1..945b2f1871 100644
--- a/guides/gs-contract-rest/complete/contract-rest-service/pom.xml
+++ b/guides/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>2.6.7</version>
+		<version>2.6.6</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/guides/gs-contract-rest/initial/contract-rest-client/pom.xml b/guides/gs-contract-rest/initial/contract-rest-client/pom.xml
index 238b04c7d3..340a709578 100644
--- a/guides/gs-contract-rest/initial/contract-rest-client/pom.xml
+++ b/guides/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>2.6.7</version>
+		<version>2.6.6</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/guides/gs-contract-rest/initial/contract-rest-service/pom.xml b/guides/gs-contract-rest/initial/contract-rest-service/pom.xml
index 69577867fd..060ea15ab9 100644
--- a/guides/gs-contract-rest/initial/contract-rest-service/pom.xml
+++ b/guides/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>2.6.7</version>
+		<version>2.6.6</version>
 		<relativePath /> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradle.properties b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradle.properties
index 3fcb9a4d64..b82cafeb6d 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradle.properties
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProject/gradle.properties
@@ -16,5 +16,5 @@
 wiremockVersion=2.30.1
 jsonAssertVersion=0.6.1
 verifierVersion=3.1.2-SNAPSHOT
-bootVersion=2.6.7
+bootVersion=2.6.6
 groovyVersion=2.4.17
diff --git a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradle.properties b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradle.properties
index 3fcb9a4d64..b82cafeb6d 100644
--- a/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradle.properties
+++ b/spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/src/test/resources/functionalTest/scenarioProjectKotlin/gradle.properties
@@ -16,5 +16,5 @@
 wiremockVersion=2.30.1
 jsonAssertVersion=0.6.1
 verifierVersion=3.1.2-SNAPSHOT
-bootVersion=2.6.7
+bootVersion=2.6.6
 groovyVersion=2.4.17