diff --git a/11_flow/server/build.gradle.kts b/11_flow/server/build.gradle.kts
index 922bae4369..cef793879a 100644
--- a/11_flow/server/build.gradle.kts
+++ b/11_flow/server/build.gradle.kts
@@ -1,7 +1,7 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
-    id("org.springframework.boot") version "3.5.5"
+    id("org.springframework.boot") version "4.0.2"
     id("io.spring.dependency-management") version "1.1.7"
     id("org.jetbrains.kotlin.plugin.jpa") version "2.2.20"
     kotlin("jvm") version "2.2.10"