diff --git a/build.gradle b/build.gradle
index fd06717..28f6235 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,13 +10,14 @@ description = 'Scheduler Service Backend API Server'
 
 java {
 	toolchain {
-		languageVersion = JavaLanguageVersion.of(21)
-		vendor = JvmVendorSpec.ADOPTOPENJDK
+		// languageVersion = JavaLanguageVersion.of(21)
+		// vendor = JvmVendorSpec.ADOPTOPENJDK
 	}
 }
 
 tasks.withType(JavaCompile) {
-	options.release.set(21)
+	sourceCompatibility = '21'
+	targetCompatibility = '21'
 }
 configurations {
 	compileOnly {