diff --git a/build.gradle b/build.gradle
index 3d91a94..297866c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '3.2.5'
-    id 'io.spring.dependency-management' version '1.1.4'
+    id 'org.springframework.boot' version '2.6.7'
+    id 'io.spring.dependency-management' version '1.1.0'
     id 'war'
 }
 
@@ -9,7 +9,7 @@
 version = '0.0.1-SNAPSHOT'
 
 java {
-    sourceCompatibility = '21'
+    sourceCompatibility = '17'
 }
 
 repositories {