diff --git a/README.rst b/README.rst
index a171ab2..7603911 100644
--- a/README.rst
+++ b/README.rst
@@ -845,6 +845,27 @@
 
 Currently the default fernet rotation driver is a shared filesystem
 
+Enable x509 and ssl communication between Keystone and Galera cluster.
+---------------------
+By default communication between Keystone and Galera is unsecure.
+
+You able to set custom certificates in pillar:
+server:
+  database:
+    x509:
+      enabled: True
+
+keystone:
+  server:
+    database:
+      x509:
+        cacert (certificate content)
+        cert (certificate content)
+        key (certificate content)
+
+You can read more about it here:
+    https://docs.openstack.org/security-guide/databases/database-access-control.html
+
 Documentation and Bugs
 ======================