diff --git a/api-ref/source/conf.py b/api-ref/source/conf.py
old mode 100755
new mode 100644
index d0702e23d8..ed97763754
--- a/api-ref/source/conf.py
+++ b/api-ref/source/conf.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-#
 # 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
diff --git a/api-ref/source/index.rst b/api-ref/source/index.rst
old mode 100755
new mode 100644
diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
old mode 100755
new mode 100644
diff --git a/doc/source/conf.py b/doc/source/conf.py
index bde81cf1d1..51839ad1d4 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -1,6 +1,15 @@
-# -*- coding: utf-8 -*-
+# 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.
 #
-
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.