diff --git a/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java b/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java
index 9caa9e2..79498df 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java
@@ -62,7 +62,7 @@
    * @throws StorageException
    */
   @Override
-  public Response<Object> apply(RevisionResource rev, Input input)
+  public Response<?> apply(RevisionResource rev, Input input)
       throws IOException, RestApiException, StorageException, ConfigInvalidException {
     Map<String, Boolean> branchMap = input.branchMap;