diff --git a/source/src/main/java/com/kezong/fataar/LibraryManifestMerger.java b/source/src/main/java/com/kezong/fataar/LibraryManifestMerger.java
index 04d9494c..2114b634 100644
--- a/source/src/main/java/com/kezong/fataar/LibraryManifestMerger.java
+++ b/source/src/main/java/com/kezong/fataar/LibraryManifestMerger.java
@@ -38,7 +38,7 @@ public void setGradleVersion(String gradleVersion) {
     protected void doFullTaskAction() throws ManifestMerger2.MergeFailureException, IOException {
         try {
             ILogger iLogger = new LoggerWrapper(getLogger());
-            ManifestMerger2.Invoker mergerInvoker = ManifestMerger2.
+            ManifestMerger2.Invoker<?> mergerInvoker = ManifestMerger2.
                     newMerger(getMainManifestFile(), iLogger, ManifestMerger2.MergeType.LIBRARY);
             List<File> secondaryManifestFiles = getSecondaryManifestFiles();
             List<ManifestProvider> manifestProviders = new ArrayList<>();