diff --git a/src/blkio.rs b/src/blkio.rs
index 8ddcbd2..1ac968e 100644
--- a/src/blkio.rs
+++ b/src/blkio.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 And Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/cgroup.rs b/src/cgroup.rs
index 4ce9ce5..51fdf60 100644
--- a/src/cgroup.rs
+++ b/src/cgroup.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/cgroup_builder.rs b/src/cgroup_builder.rs
index e32d765..318f885 100644
--- a/src/cgroup_builder.rs
+++ b/src/cgroup_builder.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/cpu.rs b/src/cpu.rs
index e02e9eb..fe942f4 100644
--- a/src/cpu.rs
+++ b/src/cpu.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/cpuset.rs b/src/cpuset.rs
index 2f04ecf..c3180d7 100644
--- a/src/cpuset.rs
+++ b/src/cpuset.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/error.rs b/src/error.rs
index 759d1a8..741e60f 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/events.rs b/src/events.rs
index 0b1576d..592ec7f 100644
--- a/src/events.rs
+++ b/src/events.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2020 Ant Group
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 use eventfd::{eventfd, EfdFlags};
 use nix::sys::eventfd;
 use std::fs::{self, File};
diff --git a/src/freezer.rs b/src/freezer.rs
index f8729ad..064d536 100644
--- a/src/freezer.rs
+++ b/src/freezer.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/hierarchies.rs b/src/hierarchies.rs
index c6e1b1e..9400237 100644
--- a/src/hierarchies.rs
+++ b/src/hierarchies.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/hugetlb.rs b/src/hugetlb.rs
index 5aa8edf..2fc5352 100644
--- a/src/hugetlb.rs
+++ b/src/hugetlb.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/lib.rs b/src/lib.rs
index 546581b..41cb2d7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/memory.rs b/src/memory.rs
index 461c50c..c8c2ff1 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/pid.rs b/src/pid.rs
index 2fadbea..353e348 100644
--- a/src/pid.rs
+++ b/src/pid.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/src/systemd.rs b/src/systemd.rs
index 5dff8e4..e0a57a4 100644
--- a/src/systemd.rs
+++ b/src/systemd.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2020 Ant Group
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `systemd` cgroup subsystem.
 //!
 use std::path::PathBuf;
diff --git a/tests/builder.rs b/tests/builder.rs
index 69a187c..69a187f 100644
--- a/tests/builder.rs
+++ b/tests/builder.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 And Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/tests/cgroup.rs b/tests/cgroup.rs
index 6833f6f..92a28e9 100644
--- a/tests/cgroup.rs
+++ b/tests/cgroup.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 And Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/tests/cpuset.rs b/tests/cpuset.rs
index 30a6176..4be3a57 100644
--- a/tests/cpuset.rs
+++ b/tests/cpuset.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 And Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/tests/devices.rs b/tests/devices.rs
index 2714666..220add9 100644
--- a/tests/devices.rs
+++ b/tests/devices.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 And Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/tests/hugetlb.rs b/tests/hugetlb.rs
index 9e3ff2c..30abd4a 100644
--- a/tests/hugetlb.rs
+++ b/tests/hugetlb.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2020 And Group
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! Integration tests about the hugetlb subsystem
 use cgroups::hugetlb::HugeTlbController;
 use cgroups::{Cgroup, Hierarchy};
diff --git a/tests/memory.rs b/tests/memory.rs
index 8838afe..4283ea6 100644
--- a/tests/memory.rs
+++ b/tests/memory.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2020 And Group
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! Integration tests about the hugetlb subsystem
 use cgroups::memory::{MemController, SetMemory};
 use cgroups::{Cgroup, Hierarchy, MaxValue};
diff --git a/tests/pids.rs b/tests/pids.rs
index a33ecb3..88a2fc0 100644
--- a/tests/pids.rs
+++ b/tests/pids.rs
@@ -1,4 +1,5 @@
 // Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 And Group
 //
 // SPDX-License-Identifier: Apache-2.0 or MIT
 //
diff --git a/tests/resources.rs b/tests/resources.rs
index d26a896..964081a 100644
--- a/tests/resources.rs
+++ b/tests/resources.rs
@@ -1,3 +1,9 @@
+// Copyright (c) 2018 Levente Kurusa
+// Copyright (c) 2020 And Group
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! Integration test about setting resources using `apply()`
 use cgroups::pid::{PidController};
 use cgroups::{Cgroup, Hierarchy, MaxValue, PidResources, Resources};