diff --git a/complete/build.gradle b/complete/build.gradle
index e44b3407..d8b42e8b 100644
--- a/complete/build.gradle
+++ b/complete/build.gradle
@@ -1,6 +1,6 @@
 plugins {
 	id 'java'
-	id 'org.springframework.boot' version '3.5.6'
+	id 'org.springframework.boot' version '4.0.0'
 	id 'com.vaadin' version '24.9.1'
 }
 
diff --git a/initial/build.gradle b/initial/build.gradle
index e44b3407..d8b42e8b 100644
--- a/initial/build.gradle
+++ b/initial/build.gradle
@@ -1,6 +1,6 @@
 plugins {
 	id 'java'
-	id 'org.springframework.boot' version '3.5.6'
+	id 'org.springframework.boot' version '4.0.0'
 	id 'com.vaadin' version '24.9.1'
 }