diff --git a/vmm/sandbox/src/cgroup.rs b/vmm/sandbox/src/cgroup.rs
index db9500d8..22850bb8 100644
--- a/vmm/sandbox/src/cgroup.rs
+++ b/vmm/sandbox/src/cgroup.rs
@@ -1,3 +1,19 @@
+/*
+Copyright 2023 The Kuasar 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.
+*/
+
 use anyhow::{anyhow, Ok, Result};
 use cgroups_rs::{
     cgroup_builder::*, cpu::CpuController, cpuset::CpuSetController, hugetlb::HugeTlbController,
diff --git a/vmm/sandbox/src/stratovirt/qmp.rs b/vmm/sandbox/src/stratovirt/qmp.rs
index 185357c9..135cf4e5 100644
--- a/vmm/sandbox/src/stratovirt/qmp.rs
+++ b/vmm/sandbox/src/stratovirt/qmp.rs
@@ -1,3 +1,19 @@
+/*
+Copyright 2023 The Kuasar 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.
+*/
+
 #![allow(warnings)]
 
 use qapi::qmp::QmpCommand;
diff --git a/wasm/src/utils.rs b/wasm/src/utils.rs
index 5686f787..0b2a6ef4 100644
--- a/wasm/src/utils.rs
+++ b/wasm/src/utils.rs
@@ -1,3 +1,19 @@
+/*
+Copyright 2023 The Kuasar 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.
+*/
+
 use oci_spec::runtime::Spec;
 
 #[cfg(feature = "wasmedge")]
diff --git a/wasm/src/wasmtime.rs b/wasm/src/wasmtime.rs
index 3713da34..e862e18f 100644
--- a/wasm/src/wasmtime.rs
+++ b/wasm/src/wasmtime.rs
@@ -1,3 +1,19 @@
+/*
+Copyright 2023 The Kuasar 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.
+*/
+
 use std::{path::Path, sync::Arc};
 
 use containerd_shim::{