diff --git a/build.gradle b/build.gradle
index 1719cbb..cef3b96 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,8 +9,10 @@ plugins {
 group 'com.bisnode.opa'
 version '0.4.2'
 
-sourceCompatibility = 1.8
-targetCompatibility = 1.8
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
 
 repositories {
     mavenCentral()