diff --git a/src/main/java/org/opensearch/securityanalytics/rules/backend/AggregationBuilders.java b/src/main/java/org/opensearch/securityanalytics/rules/backend/AggregationBuilders.java
index 56a0f3463..ca21a508f 100644
--- a/src/main/java/org/opensearch/securityanalytics/rules/backend/AggregationBuilders.java
+++ b/src/main/java/org/opensearch/securityanalytics/rules/backend/AggregationBuilders.java
@@ -1,3 +1,7 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
 package org.opensearch.securityanalytics.rules.backend;
 
 import java.util.Locale;