diff --git a/src/blkio.rs b/src/blkio.rs
index 5d00ade..8ddcbd2 100644
--- a/src/blkio.rs
+++ b/src/blkio.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `blkio` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/cgroup.rs b/src/cgroup.rs
index ece6609..4ce9ce5 100644
--- a/src/cgroup.rs
+++ b/src/cgroup.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module handles cgroup operations. Start here!
 
 use crate::error::*;
diff --git a/src/cgroup_builder.rs b/src/cgroup_builder.rs
index 1b4293b..e32d765 100644
--- a/src/cgroup_builder.rs
+++ b/src/cgroup_builder.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module allows the user to create a control group using the Builder pattern.
 //! # Example
 //!
diff --git a/src/cpu.rs b/src/cpu.rs
index 2cbeed0..e02e9eb 100644
--- a/src/cpu.rs
+++ b/src/cpu.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `cpu` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/cpuacct.rs b/src/cpuacct.rs
index ec3b967..0325723 100644
--- a/src/cpuacct.rs
+++ b/src/cpuacct.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `cpuacct` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/cpuset.rs b/src/cpuset.rs
index 7b5b7fa..2f04ecf 100644
--- a/src/cpuset.rs
+++ b/src/cpuset.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `cpuset` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/devices.rs b/src/devices.rs
index 90c386d..09628c4 100644
--- a/src/devices.rs
+++ b/src/devices.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `devices` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/error.rs b/src/error.rs
index 7bfea9b..759d1a8 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 use std::error::Error as StdError;
 use std::fmt;
 
diff --git a/src/freezer.rs b/src/freezer.rs
index 59889e5..f8729ad 100644
--- a/src/freezer.rs
+++ b/src/freezer.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `freezer` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/hierarchies.rs b/src/hierarchies.rs
index 8f27ec4..c6e1b1e 100644
--- a/src/hierarchies.rs
+++ b/src/hierarchies.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module represents the various control group hierarchies the Linux kernel supports.
 //!
 //! Currently, we only support the cgroupv1 hierarchy, but in the future we will add support for
diff --git a/src/hugetlb.rs b/src/hugetlb.rs
index 80aedf4..5aa8edf 100644
--- a/src/hugetlb.rs
+++ b/src/hugetlb.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `hugetlb` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/lib.rs b/src/lib.rs
index b4a64d6..546581b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 use log::*;
 
 use std::collections::HashMap;
diff --git a/src/memory.rs b/src/memory.rs
index 8f63b9b..461c50c 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `memory` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/net_cls.rs b/src/net_cls.rs
index c3057f9..13a2366 100644
--- a/src/net_cls.rs
+++ b/src/net_cls.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `net_cls` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/net_prio.rs b/src/net_prio.rs
index 6c2ed7b..6d4cbe0 100644
--- a/src/net_prio.rs
+++ b/src/net_prio.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `net_prio` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/perf_event.rs b/src/perf_event.rs
index 4f52b1b..e7ffe6d 100644
--- a/src/perf_event.rs
+++ b/src/perf_event.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `perf_event` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/pid.rs b/src/pid.rs
index 4eb6754..2fadbea 100644
--- a/src/pid.rs
+++ b/src/pid.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `pids` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/src/rdma.rs b/src/rdma.rs
index fb9dcc6..0611bb6 100644
--- a/src/rdma.rs
+++ b/src/rdma.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! This module contains the implementation of the `rdma` cgroup subsystem.
 //!
 //! See the Kernel's documentation for more information about this subsystem, found at:
diff --git a/tests/builder.rs b/tests/builder.rs
index e44bb5b..69a187c 100644
--- a/tests/builder.rs
+++ b/tests/builder.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! Some simple tests covering the builder pattern for control groups.
 use cgroups::*;
 use cgroups::cpu::*;
diff --git a/tests/cgroup.rs b/tests/cgroup.rs
index f78c20b..6833f6f 100644
--- a/tests/cgroup.rs
+++ b/tests/cgroup.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! Simple unit tests about the control groups system.
 use cgroups::{Cgroup, CgroupPid, Hierarchy, Subsystem};
 use cgroups::memory::{MemController, SetMemory};
diff --git a/tests/cpuset.rs b/tests/cpuset.rs
index aba3163..30a6176 100644
--- a/tests/cpuset.rs
+++ b/tests/cpuset.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 use cgroups::cpuset::CpuSetController;
 use cgroups::error::ErrorKind;
 use cgroups::{Cgroup, CgroupPid, CpuResources, Hierarchy, Resources};
diff --git a/tests/devices.rs b/tests/devices.rs
index 235351a..2714666 100644
--- a/tests/devices.rs
+++ b/tests/devices.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! Integration tests about the devices subsystem
 
 use cgroups::devices::{DevicePermissions, DeviceType, DevicesController};
diff --git a/tests/pids.rs b/tests/pids.rs
index ead4c46..a33ecb3 100644
--- a/tests/pids.rs
+++ b/tests/pids.rs
@@ -1,3 +1,8 @@
+// Copyright (c) 2018 Levente Kurusa
+//
+// SPDX-License-Identifier: Apache-2.0 or MIT
+//
+
 //! Integration tests about the pids subsystem
 use cgroups::pid::{PidController};
 use cgroups::Controller;
diff --git a/tools/create_cgroup.sh b/tools/create_cgroup.sh
index 49dbfa0..96407ad 100755
--- a/tools/create_cgroup.sh
+++ b/tools/create_cgroup.sh
@@ -1,4 +1,9 @@
 #!/bin/sh
+#
+# Copyright (c) 2018 Levente Kurusa
+#
+# SPDX-License-Identifier: Apache-2.0 or MIT
+#
 
 CONTROL_GROUPS=`cargo test -- --list 2>/dev/null | egrep 'test$' | egrep -v '^src' | cut -d':' -f1`
 
diff --git a/tools/delete_cgroup.sh b/tools/delete_cgroup.sh
index f3f83a3..e728cb5 100755
--- a/tools/delete_cgroup.sh
+++ b/tools/delete_cgroup.sh
@@ -1,4 +1,9 @@
 #!/bin/sh
+#
+# Copyright (c) 2018 Levente Kurusa
+#
+# SPDX-License-Identifier: Apache-2.0 or MIT
+#
 
 CONTROL_GROUPS=`cargo test -- --list 2>/dev/null | egrep 'test$' | egrep -v '^src' | cut -d':' -f1`