diff --git a/doc/source/contributing.rst b/doc/source/contributing.rst
index 59121cc..2d29311 100644
--- a/doc/source/contributing.rst
+++ b/doc/source/contributing.rst
@@ -5,13 +5,13 @@ Contributing to: zaqar-specs
 If you would like to contribute to the development of OpenStack,
 you must follow the steps in this page:
 
-   http://docs.openstack.org/infra/manual/developers.html
+   https://docs.openstack.org/infra/manual/developers.html
 
 Once those steps have been completed, changes to OpenStack
 should be submitted for review via the Gerrit tool, following
 the workflow documented at:
 
-   http://docs.openstack.org/infra/manual/developers.html#development-workflow
+   https://docs.openstack.org/infra/manual/developers.html#development-workflow
 
 Pull requests submitted through GitHub will be ignored.