diff --git a/src/main/java/org/opensearch/agent/tools/GetClusterStatsTool.java b/src/main/java/org/opensearch/agent/tools/GetClusterStatsTool.java
index db9b064b..3239fd20 100644
--- a/src/main/java/org/opensearch/agent/tools/GetClusterStatsTool.java
+++ b/src/main/java/org/opensearch/agent/tools/GetClusterStatsTool.java
@@ -66,7 +66,7 @@ public <T> void run(Map<String, String> parameters, ActionListener<T> listener)
             request.setShard(shard);
         }
 
-        ActionListener<ClusterAllocationExplainResponse> internalListener = new ActionListener<ClusterAllocationExplainResponse>() {
+        ActionListener<ClusterAllocationExplainResponse> internalListener = new ActionListener<>() {
 
             @Override
             public void onResponse(ClusterAllocationExplainResponse allocationExplainResponse) {