diff --git a/plugins/flow-visibility/policy-recommendation/antrea_crd.py b/plugins/flow-visibility/policy-recommendation/antrea_crd.py
index eca9ac35845..c6948ae1b58 100644
--- a/plugins/flow-visibility/policy-recommendation/antrea_crd.py
+++ b/plugins/flow-visibility/policy-recommendation/antrea_crd.py
@@ -1,3 +1,17 @@
+# Copyright 2022 Antrea Authors
+#
+# 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.
+
 # This library is used to define Antrea Network Policy related CRDs in Python.
 # Code structure is following the Kubernetes Python Client library (https://github.com/kubernetes-client/python).
 # Could be improved by using openAPI generator in the future.
diff --git a/plugins/flow-visibility/policy-recommendation/policy_recommendation_job.py b/plugins/flow-visibility/policy-recommendation/policy_recommendation_job.py
index e0da193df66..7cc7b0782a0 100644
--- a/plugins/flow-visibility/policy-recommendation/policy_recommendation_job.py
+++ b/plugins/flow-visibility/policy-recommendation/policy_recommendation_job.py
@@ -1,3 +1,17 @@
+# Copyright 2022 Antrea Authors
+#
+# 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 antrea_crd
 import datetime
 import getopt
diff --git a/plugins/flow-visibility/policy-recommendation/policy_recommendation_job_test.py b/plugins/flow-visibility/policy-recommendation/policy_recommendation_job_test.py
index 5d18e185726..3beb08e61d6 100644
--- a/plugins/flow-visibility/policy-recommendation/policy_recommendation_job_test.py
+++ b/plugins/flow-visibility/policy-recommendation/policy_recommendation_job_test.py
@@ -1,3 +1,17 @@
+# Copyright 2022 Antrea Authors
+#
+# 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 pytest
 import yaml
 from policy_recommendation_job import *
diff --git a/plugins/flow-visibility/policy-recommendation/policy_recommendation_utils.py b/plugins/flow-visibility/policy-recommendation/policy_recommendation_utils.py
index 48b547007bd..2fbfc8d705a 100644
--- a/plugins/flow-visibility/policy-recommendation/policy_recommendation_utils.py
+++ b/plugins/flow-visibility/policy-recommendation/policy_recommendation_utils.py
@@ -1,3 +1,17 @@
+# Copyright 2022 Antrea Authors
+#
+# 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 json
 import yaml