diff --git a/example-11-spring-boot/build.gradle b/example-11-spring-boot/build.gradle
index 5a4c3da..38b436a 100644
--- a/example-11-spring-boot/build.gradle
+++ b/example-11-spring-boot/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/example-12-boot-security/build.gradle b/example-12-boot-security/build.gradle
index cfc4024..3f4f30d 100644
--- a/example-12-boot-security/build.gradle
+++ b/example-12-boot-security/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/example-13-inmemory-security/build.gradle b/example-13-inmemory-security/build.gradle
index cfc4024..3f4f30d 100644
--- a/example-13-inmemory-security/build.gradle
+++ b/example-13-inmemory-security/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/example-14-jdbc-auth-security/build.gradle b/example-14-jdbc-auth-security/build.gradle
index e8c4c0f..e69c763 100644
--- a/example-14-jdbc-auth-security/build.gradle
+++ b/example-14-jdbc-auth-security/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/example-15-user-flow-security/build.gradle b/example-15-user-flow-security/build.gradle
index 2faf9d5..3274462 100644
--- a/example-15-user-flow-security/build.gradle
+++ b/example-15-user-flow-security/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/example-16-custom-auth-provider/build.gradle b/example-16-custom-auth-provider/build.gradle
index 2faf9d5..3274462 100644
--- a/example-16-custom-auth-provider/build.gradle
+++ b/example-16-custom-auth-provider/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/example-17-authorization/build.gradle b/example-17-authorization/build.gradle
index 2faf9d5..3274462 100644
--- a/example-17-authorization/build.gradle
+++ b/example-17-authorization/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/example-18-method-security/build.gradle b/example-18-method-security/build.gradle
index 2faf9d5..3274462 100644
--- a/example-18-method-security/build.gradle
+++ b/example-18-method-security/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/example-19-remember-me/build.gradle b/example-19-remember-me/build.gradle
index 2faf9d5..3274462 100644
--- a/example-19-remember-me/build.gradle
+++ b/example-19-remember-me/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/example-20-oauth/build.gradle b/example-20-oauth/build.gradle
index 612a795..5a2942a 100644
--- a/example-20-oauth/build.gradle
+++ b/example-20-oauth/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/example-21-jwt/build.gradle b/example-21-jwt/build.gradle
index 9697a63..ad82399 100644
--- a/example-21-jwt/build.gradle
+++ b/example-21-jwt/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
 }
 
diff --git a/notes-app/build.gradle b/notes-app/build.gradle
index 1f9e084..9bad386 100644
--- a/notes-app/build.gradle
+++ b/notes-app/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.4.3'
     id 'io.spring.dependency-management' version '1.1.7'
     id 'java'
 }