diff --git a/radius/api/urls.py b/radius/api/urls.py
index 3e141936..2ab8ec91 100644
--- a/radius/api/urls.py
+++ b/radius/api/urls.py
@@ -23,17 +23,17 @@ from . import views
 
 urls_functional_view = [
     (
-        r"radius/authorize/(?P<nas_id>[^/]+)/(?P<username>.+)/(?P<mac_address>[0-9a-fA-F\:\-]{17})$",
+        r"radius/authorize/(?P<nas_id>[^/]+)/(?P<username>.+)/(?P<mac_address>[^/]{17})$",
         views.authorize,
         None,
     ),
     (
-        r"radius/post_auth/(?P<nas_id>[^/]+)/(?P<nas_port>.+)/(?P<user_mac>[0-9a-fA-F\:\-]{17})$",
+        r"radius/post_auth/(?P<nas_id>[^/]+)/(?P<nas_port>.+)/(?P<user_mac>[^/]{17})$",
         views.post_auth,
         None,
     ),
     (
-        r"radius/autoregister/(?P<nas_id>[^/]+)/(?P<username>.+)/(?P<mac_address>[0-9a-fA-F\:\-]{17})$",
+        r"radius/autoregister/(?P<nas_id>[^/]+)/(?P<username>.+)/(?P<mac_address>[^/]{17})$",
         views.autoregister_machine,
         None,
     ),