diff --git a/mcapi_vexxhost/playbooks/files/openstack_deploy/user_variables_z_magnum.yml b/mcapi_vexxhost/playbooks/files/openstack_deploy/user_variables_z_magnum.yml
index d3a17372..0e30030e 100644
--- a/mcapi_vexxhost/playbooks/files/openstack_deploy/user_variables_z_magnum.yml
+++ b/mcapi_vexxhost/playbooks/files/openstack_deploy/user_variables_z_magnum.yml
@@ -13,9 +13,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+magnum_magnum_cluster_api_git_install_branch: v0.21.0
+
 # install magnum-cluster-api and kubernetes python package into magnum venv
 magnum_user_pip_packages:
-  - git+https://github.com/vexxhost/magnum-cluster-api@main#egg=magnum-cluster-api
+  - "git+https://github.com/vexxhost/magnum-cluster-api@{{ magnum_magnum_cluster_api_git_install_branch }}#egg=magnum-cluster-api"
   - kubernetes
 
 # ensure that the internal VIP CA is trusted by the CAPI driver