diff --git a/mars/services/task/task_info_collector.py b/mars/services/task/task_info_collector.py
index 4d8428ae7c..22bd2fbc1e 100644
--- a/mars/services/task/task_info_collector.py
+++ b/mars/services/task/task_info_collector.py
@@ -1,3 +1,17 @@
+# Copyright 1999-2021 Alibaba Group Holding Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 import asyncio
 import functools
 import logging
diff --git a/mars/services/task/worker/service.py b/mars/services/task/worker/service.py
index c7edb2b028..b5d243ba53 100644
--- a/mars/services/task/worker/service.py
+++ b/mars/services/task/worker/service.py
@@ -1,3 +1,17 @@
+# Copyright 1999-2021 Alibaba Group Holding Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 from .... import oscar as mo
 from ...core import AbstractService
 from ..task_info_collector import TaskInfoCollectorActor