diff --git a/src/gardenlinux/features/__main__.py b/src/gardenlinux/features/__main__.py
index 0c2a3378..4d3bde56 100644
--- a/src/gardenlinux/features/__main__.py
+++ b/src/gardenlinux/features/__main__.py
@@ -61,7 +61,7 @@ def main():
 
     if args.cname:
         re_match = re.match(
-            "([a-zA-Z0-9]+([\\_\\-][a-zA-Z0-9]+)+?)(-([a-z0-9]+)(-([a-z0-9.]+)-([a-z0-9]+))*)?$",
+            "([a-zA-Z0-9]+([\\_\\-][a-zA-Z0-9]+)*?)(-([a-z0-9]+)(-([a-z0-9.]+)-([a-z0-9]+))*)?$",
             args.cname,
         )
 
diff --git a/src/gardenlinux/features/cname_main.py b/src/gardenlinux/features/cname_main.py
index 5743f13d..9f05fd23 100644
--- a/src/gardenlinux/features/cname_main.py
+++ b/src/gardenlinux/features/cname_main.py
@@ -26,7 +26,7 @@ def main():
     args = parser.parse_args()
 
     re_match = re.match(
-        "([a-zA-Z0-9]+([\\_\\-][a-zA-Z0-9]+)+?)(-([a-z0-9]+)(-([a-z0-9.]+)-([a-z0-9]+))*)?$",
+        "([a-zA-Z0-9]+([\\_\\-][a-zA-Z0-9]+)*?)(-([a-z0-9]+)(-([a-z0-9.]+)-([a-z0-9]+))*)?$",
         args.cname,
     )