diff --git a/inventory/group_vars/all/all.yml b/inventory/group_vars/all/all.yml
index eb0b2b2905..a1d56e0e34 100644
--- a/inventory/group_vars/all/all.yml
+++ b/inventory/group_vars/all/all.yml
@@ -14,7 +14,7 @@
 # limitations under the License.
 
 ## OpenStack Source Code Release
-openstack_release: 17.0.0
+openstack_release: master
 
 ## Verbosity Options
 debug: False