diff --git a/build.gradle b/build.gradle
index e2808bd..96cd8c8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -17,8 +17,8 @@ apply plugin: 'kotlin'
 group = 'click.seichi'
 version = '2.0.0'
 
-sourceCompatibility = '1.11'
-targetCompatibility = '1.11'
+sourceCompatibility = '17'
+targetCompatibility = '17'
 
 configurations {
     embed