diff --git a/build.gradle b/build.gradle
index bf4733d..4f2a6e9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -30,6 +30,6 @@ test {
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(8))
+        languageVersion = JavaLanguageVersion.of(8)
     }
 }