diff --git a/thymeleaf-layout-dialect-benchmark/build.gradle b/thymeleaf-layout-dialect-benchmark/build.gradle
index 5cb6c21c..82399613 100644
--- a/thymeleaf-layout-dialect-benchmark/build.gradle
+++ b/thymeleaf-layout-dialect-benchmark/build.gradle
@@ -1,12 +1,12 @@
-/* 
+/*
  * Copyright 2016, Emanuel Rabina (http://www.ultraq.net.nz/)
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *     http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -42,7 +42,9 @@ dependencies {
 }
 
 java {
-	sourceCompatibility = JavaVersion.VERSION_17
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(17)
+	}
 }
 
 tasks.register('startWebApp', ExecFork) {
diff --git a/thymeleaf-layout-dialect/build.gradle b/thymeleaf-layout-dialect/build.gradle
index 29cf9273..683fbf47 100644
--- a/thymeleaf-layout-dialect/build.gradle
+++ b/thymeleaf-layout-dialect/build.gradle
@@ -1,12 +1,12 @@
-/* 
+/*
  * Copyright 2012, Emanuel Rabina (http://www.ultraq.net.nz/)
- * 
+ *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *     http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -54,7 +54,9 @@ dependencies {
 }
 
 java {
-	sourceCompatibility = JavaVersion.VERSION_1_8
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(8)
+	}
 }
 
 test {