diff --git a/batch-boot-jpa-sample/pom.xml b/batch-boot-jpa-sample/pom.xml
index 7311074c1..b5f051361 100644
--- a/batch-boot-jpa-sample/pom.xml
+++ b/batch-boot-jpa-sample/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.6</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.example.bootbatchjpa</groupId>
diff --git a/boot-mongodb-elasticsearch/pom.xml b/boot-mongodb-elasticsearch/pom.xml
index ae6df02da..168e66a21 100644
--- a/boot-mongodb-elasticsearch/pom.xml
+++ b/boot-mongodb-elasticsearch/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.6</version>
         <relativePath /> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.example.mongoes</groupId>
diff --git a/boot-opensearch-sample/pom.xml b/boot-opensearch-sample/pom.xml
index cdc5d35b7..2c727e175 100644
--- a/boot-opensearch-sample/pom.xml
+++ b/boot-opensearch-sample/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.6</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.example.opensearch</groupId>
diff --git a/boot-strategy-plugin/build.gradle b/boot-strategy-plugin/build.gradle
index ac5959fab..beee388ca 100644
--- a/boot-strategy-plugin/build.gradle
+++ b/boot-strategy-plugin/build.gradle
@@ -1,6 +1,6 @@
 plugins {
 	id 'java'
-	id 'org.springframework.boot' version '3.4.0'
+	id 'org.springframework.boot' version '3.3.6'
 	id 'io.spring.dependency-management' version '1.1.6'
 	id 'org.graalvm.buildtools.native' version '0.10.3'
 }
diff --git a/boot-togglz-sample/pom.xml b/boot-togglz-sample/pom.xml
index 40e1b9db2..a5eb4f9b7 100644
--- a/boot-togglz-sample/pom.xml
+++ b/boot-togglz-sample/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.6</version>
         <relativePath /> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.example.featuretoggle</groupId>
diff --git a/httpClients/boot-http-proxy/pom.xml b/httpClients/boot-http-proxy/pom.xml
index b146cc887..26c155e1e 100644
--- a/httpClients/boot-http-proxy/pom.xml
+++ b/httpClients/boot-http-proxy/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.6</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.example.rest.proxy</groupId>
diff --git a/httpClients/boot-rest-template/pom.xml b/httpClients/boot-rest-template/pom.xml
index ce7d45033..0306db99c 100644
--- a/httpClients/boot-rest-template/pom.xml
+++ b/httpClients/boot-rest-template/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.6</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.example.rest.template</groupId>
diff --git a/jpa/keyset-pagination/blaze-persistence/pom.xml b/jpa/keyset-pagination/blaze-persistence/pom.xml
index 3bb525481..3c82a2a57 100644
--- a/jpa/keyset-pagination/blaze-persistence/pom.xml
+++ b/jpa/keyset-pagination/blaze-persistence/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.6</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.example.keysetpagination</groupId>
diff --git a/jpa/multitenancy/multidatasource-multitenancy/pom.xml b/jpa/multitenancy/multidatasource-multitenancy/pom.xml
index 86b874d97..47918b1e0 100644
--- a/jpa/multitenancy/multidatasource-multitenancy/pom.xml
+++ b/jpa/multitenancy/multidatasource-multitenancy/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.6</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.example.multitenancy</groupId>
diff --git a/jpa/multitenancy/multitenancy-db/pom.xml b/jpa/multitenancy/multitenancy-db/pom.xml
index 73f534e71..e0648e1c2 100644
--- a/jpa/multitenancy/multitenancy-db/pom.xml
+++ b/jpa/multitenancy/multitenancy-db/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.6</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.example.multitenancy.db</groupId>