diff --git a/02_threads/server/build.gradle.kts b/02_threads/server/build.gradle.kts
index ef2a785b89..fb43d82cb3 100644
--- a/02_threads/server/build.gradle.kts
+++ b/02_threads/server/build.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-    id("org.springframework.boot") version "3.5.5"
+    id("org.springframework.boot") version "4.0.1"
     id("io.spring.dependency-management") version "1.1.7"
     val kotlinVersion = "2.2.20"
     id("org.jetbrains.kotlin.plugin.jpa") version kotlinVersion