diff --git a/server/agg/agg-core/src/main/java/io/holoinsight/server/agg/v1/core/conf/JoinMeta.java b/server/agg/agg-core/src/main/java/io/holoinsight/server/agg/v1/core/conf/JoinMeta.java
index a7a40d1fa..d9feca84c 100644
--- a/server/agg/agg-core/src/main/java/io/holoinsight/server/agg/v1/core/conf/JoinMeta.java
+++ b/server/agg/agg-core/src/main/java/io/holoinsight/server/agg/v1/core/conf/JoinMeta.java
@@ -1,3 +1,6 @@
+/*
+ * Copyright 2022 Holoinsight Project Authors. Licensed under Apache-2.0.
+ */
 package io.holoinsight.server.agg.v1.core.conf;
 
 import java.util.Map;
diff --git a/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/AggMetaService.java b/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/AggMetaService.java
index e82740251..7fba41f51 100644
--- a/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/AggMetaService.java
+++ b/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/AggMetaService.java
@@ -1,3 +1,6 @@
+/*
+ * Copyright 2022 Holoinsight Project Authors. Licensed under Apache-2.0.
+ */
 package io.holoinsight.server.agg.v1.executor.executor;
 
 import java.util.List;
diff --git a/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/AggMetaServiceImpl.java b/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/AggMetaServiceImpl.java
index da02ff99e..3a6d5e589 100644
--- a/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/AggMetaServiceImpl.java
+++ b/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/AggMetaServiceImpl.java
@@ -1,3 +1,6 @@
+/*
+ * Copyright 2022 Holoinsight Project Authors. Licensed under Apache-2.0.
+ */
 package io.holoinsight.server.agg.v1.executor.executor;
 
 import java.time.Duration;
diff --git a/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/StaticAggMetaService.java b/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/StaticAggMetaService.java
index 4515cf330..2e33a0cc4 100644
--- a/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/StaticAggMetaService.java
+++ b/server/agg/agg-executor/src/main/java/io/holoinsight/server/agg/v1/executor/executor/StaticAggMetaService.java
@@ -1,3 +1,6 @@
+/*
+ * Copyright 2022 Holoinsight Project Authors. Licensed under Apache-2.0.
+ */
 package io.holoinsight.server.agg.v1.executor.executor;
 
 import java.util.ArrayList;