diff --git a/bumblebee/modules/vpn.py b/bumblebee/modules/vpn.py
index 7797614..a43e36b 100644
--- a/bumblebee/modules/vpn.py
+++ b/bumblebee/modules/vpn.py
@@ -66,7 +66,7 @@ class Module(bumblebee.engine.Module):
     def _on_vpn_disconnect(self):
         try:
             bumblebee.util.execute("nmcli c down \"{vpn}\""
-                                   .format(self._connected_vpn_profile))
+                                   .format(vpn=self._connected_vpn_profile))
             self._connected_vpn_profile = None
         except Exception as e:
             logging.exception("Couldn't disconnect VPN connection")
@@ -76,7 +76,7 @@ class Module(bumblebee.engine.Module):
 
         try:
             bumblebee.util.execute("nmcli c up \"{vpn}\""
-                                   .format(self._connected_vpn_profile))
+                                   .format(vpn=self._connected_vpn_profile))
             self._connected_vpn_profile = name
         except Exception as e:
             logging.exception("Couldn't establish VPN connection")