diff --git a/gradle-plugins/builder-plugins/modules/common-lib/build.gradle.kts b/gradle-plugins/builder-plugins/modules/common-lib/build.gradle.kts
index 6d950b3..b74bf1d 100644
--- a/gradle-plugins/builder-plugins/modules/common-lib/build.gradle.kts
+++ b/gradle-plugins/builder-plugins/modules/common-lib/build.gradle.kts
@@ -13,7 +13,7 @@ dependencies {
 
 kotlin {
   jvmToolchain {
-    (this as JavaToolchainSpec).languageVersion.set(JavaLanguageVersion.of(gradleJvmTarget))
+    languageVersion.set(JavaLanguageVersion.of(gradleJvmTarget))
   }
 }