diff --git a/backup.py b/backup.py
index 1e23d13..98a96c2 100644
--- a/backup.py
+++ b/backup.py
@@ -24,7 +24,7 @@ def get_json(url, token):
 
 
 def check_name(name):
-    if not re.match(r"^\w[-\.\w]*$", name):
+    if not re.match(r"^\w|-|\.[-\.\w]*$", name):
         raise RuntimeError("invalid name '{0}'".format(name))
     return name