diff --git a/wireguard-install.sh b/wireguard-install.sh
index 86be9f6..5271500 100644
--- a/wireguard-install.sh
+++ b/wireguard-install.sh
@@ -1,8 +1,31 @@
 #!/bin/bash
 #
+# https://github.com/hwdsl2/wireguard-install
+#
+# Based on the work of Nyr and contributors at:
 # https://github.com/Nyr/wireguard-install
 #
-# Copyright (c) 2020 Nyr. Released under the MIT License.
+# Copyright (c) 2022 Lin Song <linsongui@gmail.com>
+# Copyright (c) 2020-2022 Nyr
+#
+# Released under the MIT License.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy of
+# this software and associated documentation files (the "Software"), to deal in
+# the Software without restriction, including without limitation the rights to
+# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+# the Software, and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
 # Detect Debian users running the script with "sh" instead of bash