diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 15ce1e8874d6ee19b709059c1f35afd19a66cfd0..555fcd2a895db44ca7630bfff2093bf160fa2e1d 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -1,3 +1,8 @@
+If you would like to contribute to the development of oslo's libraries,
+first you must take a look to this page:
+
+   https://specs.openstack.org/openstack/oslo-specs/specs/policy/contributing.html
+
 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