diff --git a/plugins/Zeroname/SiteManagerPlugin.py b/plugins/Zeroname/SiteManagerPlugin.py
index 2d1979d8..0ddcbd4f 100644
--- a/plugins/Zeroname/SiteManagerPlugin.py
+++ b/plugins/Zeroname/SiteManagerPlugin.py
@@ -30,7 +30,7 @@ class SiteManagerPlugin(object):
 
     # Return: True if the address is domain
     def isDomain(self, address):
-        return re.match("(.*?)([A-Za-z0-9_-]+\.[A-Za-z0-9]+)$", address)
+        return re.match("(.*?)([A-Za-z0-9_-]+\.bit)$", address)
 
     # Resolve domain
     # Return: The address or None