diff --git a/build.gradle b/build.gradle
index 3422e19..aba3dd6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -71,7 +71,7 @@ jar {
 }
 
 task sourceJar(type: Jar, dependsOn: classes) {
-   classifier = 'sources'
+   archiveClassifier = 'sources'
    from sourceSets.main.allJava
 }
 
@@ -91,7 +91,7 @@ publishing {
          from components.java
 
          artifact sourceJar {
-            classifier 'sources'
+            archiveClassifier = 'sources'
          }
       }
    }