diff --git a/build.gradle b/build.gradle
index 561c967..7d22ef8 100755
--- a/build.gradle
+++ b/build.gradle
@@ -93,12 +93,12 @@ jar {
 }
 
 task sourcesJar(type: Jar) {
-    archiveClassifier 'sources'
+    classifier = 'sources'
     from sourceSets.main.allSource
 }
 
 task groovydocJar(type: Jar, dependsOn: groovydoc) {
-    archiveClassifier 'groovydoc'
+    classifier = 'groovydoc'
     from groovydoc.destinationDir
 }