diff --git a/builder_test.go b/builder_test.go
index aac9857..498a658 100644
--- a/builder_test.go
+++ b/builder_test.go
@@ -1,3 +1,17 @@
+// Copyright 2022 Linka Cloud  All rights reserved.
+//
+// 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.
+
 package d2vm
 
 import (
diff --git a/cmd/d2vm/run/hetzner.go b/cmd/d2vm/run/hetzner.go
index f3022f6..1250c2b 100644
--- a/cmd/d2vm/run/hetzner.go
+++ b/cmd/d2vm/run/hetzner.go
@@ -1,3 +1,17 @@
+// Copyright 2022 Linka Cloud  All rights reserved.
+//
+// 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.
+
 package run
 
 import (
@@ -70,8 +84,6 @@ func runHetzner(ctx context.Context, imgPath string, stdin io.Reader, stderr io.
 		return err
 	}
 	defer src.Close()
-	// TODO(adphi): check image format
-	// TODO(adphi): convert to raw if needed
 
 	c := hcloud.NewClient(hcloud.WithToken(hetznerToken))
 	st, _, err := c.ServerType.GetByName(ctx, hetznerVMType)
diff --git a/cmd/d2vm/version.go b/cmd/d2vm/version.go
index 5d236d2..dbedd93 100644
--- a/cmd/d2vm/version.go
+++ b/cmd/d2vm/version.go
@@ -1,3 +1,17 @@
+// Copyright 2022 Linka Cloud  All rights reserved.
+//
+// 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.
+
 package main
 
 import (
diff --git a/version.go b/version.go
index ed3a300..ca04e88 100644
--- a/version.go
+++ b/version.go
@@ -1,3 +1,17 @@
+// Copyright 2022 Linka Cloud  All rights reserved.
+//
+// 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.
+
 package d2vm
 
 var (