diff --git a/build.gradle b/build.gradle
index dc2ac93..bd29aba 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
     repositories {
-        jcenter();
+        jcenter()
     }
 }
 
@@ -66,6 +66,7 @@
 
 jar {
     from sourceSets.main.allSource
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
 }
 
 license {