diff --git a/cmd/isulad_kit/copy.go b/cmd/isulad_kit/copy.go
index 97a4862a926590d55d5847eaa0ee88b6c12d042c..0dca410d277229a7ceaed8dc77740e49de1b427b 100644
--- a/cmd/isulad_kit/copy.go
+++ b/cmd/isulad_kit/copy.go
@@ -1,4 +1,4 @@
-// Copyright (c) Huawei Technologies Co., Ltd. 2019. All rights reserved.
+// Copyright (c) Huawei Technologies Co., Ltd. 2019-2020. All rights reserved.
 // iSulad-kit licensed under the Mulan PSL v1.
 // You can use this software according to the terms and conditions of the Mulan PSL v1.
 // You may obtain a copy of Mulan PSL v1 at:
@@ -11,6 +11,24 @@
 // Author: lifeng
 // Create: 2019-05-06
 
+// Since some of this code is derived from skopeo, their copyright
+// is retained here....
+//
+// 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.
+
+// The original version of this file can be found at
+// https://github.com/containers/skopeo/blob/master/cmd/skopeo/copy.go
+
 package main
 
 import (
diff --git a/cmd/isulad_kit/image.go b/cmd/isulad_kit/image.go
index 6159d439687d312d6480a87fa4b24f9373dbaf50..13a04c16623ae90be5c5525e821264860bfdc7b3 100644
--- a/cmd/isulad_kit/image.go
+++ b/cmd/isulad_kit/image.go
@@ -1,4 +1,4 @@
-// Copyright (c) Huawei Technologies Co., Ltd. 2019. All rights reserved.
+// Copyright (c) Huawei Technologies Co., Ltd. 2019-2020. All rights reserved.
 // iSulad-kit licensed under the Mulan PSL v1.
 // You can use this software according to the terms and conditions of the Mulan PSL v1.
 // You may obtain a copy of Mulan PSL v1 at:
@@ -11,6 +11,24 @@
 // Author: lifeng
 // Create: 2019-05-06
 
+// Since some of this code is derived from cri-o, their copyright
+// is retained here....
+//
+// 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.
+//
+// The original version of this file can be found at
+// https://github.com/cri-o/cri-o/blob/master/internal/pkg/storage/image.go
+
 package main
 
 import (
diff --git a/cmd/isulad_kit/main.go b/cmd/isulad_kit/main.go
index d7bb497d56f4a005ea4d991824370e4971a6d85c..a04d63aa9c070d67e6b3ea3ce93f1cf613d3e042 100644
--- a/cmd/isulad_kit/main.go
+++ b/cmd/isulad_kit/main.go
@@ -1,4 +1,4 @@
-// Copyright (c) Huawei Technologies Co., Ltd. 2019. All rights reserved.
+// Copyright (c) Huawei Technologies Co., Ltd. 2019-2020. All rights reserved.
 // iSulad-kit licensed under the Mulan PSL v1.
 // You can use this software according to the terms and conditions of the Mulan PSL v1.
 // You may obtain a copy of Mulan PSL v1 at:
@@ -11,6 +11,24 @@
 // Author: lifeng
 // Create: 2019-05-06
 
+// Since some of this code is derived from skopeo, their copyright
+// is retained here....
+//
+// 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.
+
+// The original version of this file can be found at
+// https://github.com/containers/skopeo/blob/master/cmd/skopeo/main.go
+
 package main
 
 import (
diff --git a/cmd/isulad_kit/runtime.go b/cmd/isulad_kit/runtime.go
index a8d8d2110d728be4384a5581b6c673a7ce8776ee..d8bedbeda91c1ba8f589e050da284185805ad507 100644
--- a/cmd/isulad_kit/runtime.go
+++ b/cmd/isulad_kit/runtime.go
@@ -1,4 +1,4 @@
-// Copyright (c) Huawei Technologies Co., Ltd. 2019. All rights reserved.
+// Copyright (c) Huawei Technologies Co., Ltd. 2019-2020. All rights reserved.
 // iSulad-kit licensed under the Mulan PSL v1.
 // You can use this software according to the terms and conditions of the Mulan PSL v1.
 // You may obtain a copy of Mulan PSL v1 at:
@@ -11,6 +11,24 @@
 // Author: lifeng
 // Create: 2019-05-06
 
+// Since some of this code is derived from cri-o, their copyright
+// is retained here....
+//
+// 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.
+//
+// The original version of this file can be found at
+// https://github.com/cri-o/cri-o/blob/master/internal/pkg/storage/runtime.go
+
 package main
 
 import (
diff --git a/cmd/isulad_kit/utils.go b/cmd/isulad_kit/utils.go
index fd7f5282d8ab319a0f4eb03df0a99cb6634aec99..e90c8d252286ad3ce31f0af9c40e45a245f46698 100644
--- a/cmd/isulad_kit/utils.go
+++ b/cmd/isulad_kit/utils.go
@@ -1,4 +1,4 @@
-// Copyright (c) Huawei Technologies Co., Ltd. 2019. All rights reserved.
+// Copyright (c) Huawei Technologies Co., Ltd. 2019-2020. All rights reserved.
 // iSulad-kit licensed under the Mulan PSL v1.
 // You can use this software according to the terms and conditions of the Mulan PSL v1.
 // You may obtain a copy of Mulan PSL v1 at:
@@ -11,6 +11,24 @@
 // Author: lifeng
 // Create: 2019-05-06
 
+// Since some of this code is derived from skopeo, their copyright
+// is retained here....
+//
+// 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.
+
+// The original version of this file can be found at
+// https://github.com/containers/skopeo/blob/master/cmd/skopeo/utils.go
+
 package main
 
 import (
diff --git a/isula/isula_image.proto b/isula/isula_image.proto
index 07cd10182f21ad60ed7f123f0ee5e9a1e92f195d..cc040054b6f5297b2eceeec1ec928385a5371f1b 100644
--- a/isula/isula_image.proto
+++ b/isula/isula_image.proto
@@ -1,4 +1,4 @@
-// Copyright (c) Huawei Technologies Co., Ltd. 2019. All rights reserved.
+// Copyright (c) Huawei Technologies Co., Ltd. 2019-2020. All rights reserved.
 // iSulad-kit licensed under the Mulan PSL v1.
 // You can use this software according to the terms and conditions of the Mulan PSL v1.
 // You may obtain a copy of Mulan PSL v1 at:
@@ -11,7 +11,26 @@
 // Author: liuhao
 // Create: 2019-07-12
 
-// To regenerate api.pb.go run hack/update-generated-runtime.sh
+// Since some of this code is derived from Kubernetes, their copyright
+// is retained here....
+//
+// Copyright 2018 The Kubernetes 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.
+
+// The original version of this proto can be found at
+// https://github.com/cri-o/cri-o/blob/master/vendor/k8s.io/cri-api/pkg/apis/runtime/v1alpha2/api.proto
+
 syntax = 'proto3';
 
 package isula;