diff --git a/mariadb-103.sh b/mariadb-103.sh
index 35987f4..6bd031a 100644
--- a/mariadb-103.sh
+++ b/mariadb-103.sh
@@ -1,5 +1,19 @@
 #!/bin/bash
 
+# Copyright (C) 2023 Thien Tran
+#
+# 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.
+
 output(){
     echo -e '\e[36m'"$1"'\e[0m';
 }
diff --git a/mariadb-104-legacy.sh b/mariadb-104-legacy.sh
index 8bbdb55..7226864 100644
--- a/mariadb-104-legacy.sh
+++ b/mariadb-104-legacy.sh
@@ -1,5 +1,19 @@
 #!/bin/bash
 
+# Copyright (C) 2023 Thien Tran
+#
+# 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.
+
 output(){
     echo -e '\e[36m'"$1"'\e[0m';
 }
diff --git a/mariadb-104.sh b/mariadb-104.sh
index 4e7427e..b995ecc 100644
--- a/mariadb-104.sh
+++ b/mariadb-104.sh
@@ -1,5 +1,19 @@
 #!/bin/bash
 
+# Copyright (C) 2023 Thien Tran
+#
+# 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.
+
 output(){
     echo -e '\e[36m'"$1"'\e[0m';
 }