diff --git a/buildSrc/src/main/groovy/io/spring/gradle/convention/SpringModulePlugin.groovy b/buildSrc/src/main/groovy/io/spring/gradle/convention/SpringModulePlugin.groovy
index 36a7013f..a4e87a51 100644
--- a/buildSrc/src/main/groovy/io/spring/gradle/convention/SpringModulePlugin.groovy
+++ b/buildSrc/src/main/groovy/io/spring/gradle/convention/SpringModulePlugin.groovy
@@ -14,8 +14,9 @@
  * the License.
  */
 
-package io.spring.gradle.convention;
+package io.spring.gradle.convention
 
+import org.gradle.api.JavaVersion;
 import org.gradle.api.Project
 import org.gradle.api.plugins.JavaLibraryPlugin;
 import org.gradle.api.plugins.MavenPlugin;
@@ -40,6 +41,9 @@ class SpringModulePlugin extends AbstractSpringJavaPlugin {
 		if (!Utils.isRelease(project)) {
 			deployArtifacts.dependsOn project.tasks.artifactoryPublish
 		}
+
+		project.java.sourceCompatibility = JavaVersion.VERSION_1_8;
+		project.java.targetCompatibility = JavaVersion.VERSION_1_8;
 	}
 
 }