diff --git a/README.rst b/README.rst
index ee64e22..d356390 100644
--- a/README.rst
+++ b/README.rst
@@ -1066,6 +1066,37 @@
 
 .. code-block::
 
+Change files permissions for keystone service:
+=======================================
+In order to change file permissions a few data need to be set:.
+'files' - block to set permissions to files.
+It could be set the following data:
+- full path to file
+- user ( default value is 'root' ) this parameter is optional.
+- group ( default value is 'keystone' ) this parameter is optional
+- mode ( default value is '0640' ) this parameter is optional
+'directories' - block to set permissions to directories.
+- full path to directory
+- user ( default value is 'root' ) this parameter is optional
+- group ( default value is 'keystone' ) this parameter is optional
+- mode ( default value is '0750' ) this parameter is optional
+
+.. code-block:: yaml
+      
+    keystone:
+      files:
+        /etc/keystone/keystone.conf:
+          user: 'root'
+          group: 'keystone'
+          mode: '0750'
+      directories:
+        /etc/keystone:
+          user: 'root'
+          group: 'keystone'
+          mode: '0750'
+
+
+
 Upgrades
 ========