diff --git a/codegen-test/build.gradle b/codegen-test/build.gradle
index 54eb452..0d252a9 100644
--- a/codegen-test/build.gradle
+++ b/codegen-test/build.gradle
@@ -19,7 +19,7 @@ buildscript {
 
 plugins {
     id 'java'
-    id 'org.jetbrains.kotlin.jvm' version '1.9.25'
+    id 'org.jetbrains.kotlin.jvm' version '2.0.20'
     id 'org.seasar.doma.compile' version '1.1.0'
 }