diff --git a/cloud-gateway/build.gradle b/cloud-gateway/build.gradle
index 1f323559..c8f22d17 100644
--- a/cloud-gateway/build.gradle
+++ b/cloud-gateway/build.gradle
@@ -6,7 +6,7 @@
 
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '3.1.5'
+    id 'org.springframework.boot' version '3.5.7'
     id 'io.spring.dependency-management' version '1.1.5'
 }
 
diff --git a/department-service/pom.xml b/department-service/pom.xml
index 92cfa793..a28f9cc4 100644
--- a/department-service/pom.xml
+++ b/department-service/pom.xml
@@ -10,7 +10,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.1.5</version>
+        <version>3.5.7</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.saurabh</groupId>
diff --git a/employee-service/pom.xml b/employee-service/pom.xml
index a718d8f1..522788b9 100644
--- a/employee-service/pom.xml
+++ b/employee-service/pom.xml
@@ -10,7 +10,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.1.5</version>
+        <version>3.5.7</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.saurabh</groupId>
diff --git a/rxjava-tutorial/build.gradle b/rxjava-tutorial/build.gradle
index ebfa5939..be7eaa4b 100644
--- a/rxjava-tutorial/build.gradle
+++ b/rxjava-tutorial/build.gradle
@@ -7,7 +7,7 @@
 plugins {
     id 'java'
     id "io.freefair.lombok" version "8.6"  // for lombok processors
-    id 'org.springframework.boot' version '3.1.5'
+    id 'org.springframework.boot' version '3.5.7'
     id 'io.spring.dependency-management' version '1.1.5'
 }
 
diff --git a/sample-rest-app/lib/pom.xml b/sample-rest-app/lib/pom.xml
index 543d5249..0834c93f 100644
--- a/sample-rest-app/lib/pom.xml
+++ b/sample-rest-app/lib/pom.xml
@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.1.5</version>
+		<version>3.5.7</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/sample-rest-app/rest-sample/pom.xml b/sample-rest-app/rest-sample/pom.xml
index d33d5bca..24cbf700 100644
--- a/sample-rest-app/rest-sample/pom.xml
+++ b/sample-rest-app/rest-sample/pom.xml
@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.1.5</version>
+		<version>3.5.7</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/service-registry/build.gradle b/service-registry/build.gradle
index 73eda19e..560cc803 100644
--- a/service-registry/build.gradle
+++ b/service-registry/build.gradle
@@ -7,7 +7,7 @@
 
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '3.1.5'
+    id 'org.springframework.boot' version '3.5.7'
     id 'io.spring.dependency-management' version '1.1.5'
 }