diff --git a/roles/openshift-apps/mirrormanager/templates/_macros.yml b/roles/openshift-apps/mirrormanager/templates/_macros.yml
index eb2d2b647d..172626e464 100644
--- a/roles/openshift-apps/mirrormanager/templates/_macros.yml
+++ b/roles/openshift-apps/mirrormanager/templates/_macros.yml
@@ -88,5 +88,5 @@
 {# oc describe project/mirrormanager | grep supplemental-groups #}
 {% macro security_context() -%}
       securityContext:
-        supplementalGroups: [{{ (env == "staging")|ternary("1001280000", "1000890000") }}]
+        supplementalGroups: [{{ (env == "staging")|ternary("1001280000", "1000890000") }},"263"]
 {% endmacro %}