diff --git a/build.gradle b/build.gradle
index 65f0778..a2cb5c9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,8 +13,8 @@
 
 group = 'com.ntlab'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '17'
-//ext['tomcat.version'] = '9.0.62'
+sourceCompatibility = '11'
+ext['tomcat.version'] = '9.0.10'
 
 repositories {
     mavenCentral()