diff --git a/warden3/contrib/warden_ra/warden_ra.py b/warden3/contrib/warden_ra/warden_ra.py
index ccbac97e51f89fac9b5aca17f7467dc38033d1b9..0e8a0a6328a9781d44edc04427fef38b5f43005c 100755
--- a/warden3/contrib/warden_ra/warden_ra.py
+++ b/warden3/contrib/warden_ra/warden_ra.py
@@ -365,7 +365,7 @@ def get_args():
     subargp_reg.add_argument("--name", action="store", type=str,
         required=True, help="client name")
     subargp_reg.add_argument("--admins", action="store", type=str,
-        nargs="*", help="administrator list")
+        required=True, nargs="*", help="administrator list")
 
     subargp_apply = subargp.add_parser("applicant", add_help=False,
         description="Set client into certificate application mode and set its password",