diff --git a/admin/fleetcommander/database.py b/admin/fleetcommander/database.py
index 72d8cecd..b6b26d77 100644
--- a/admin/fleetcommander/database.py
+++ b/admin/fleetcommander/database.py
@@ -98,7 +98,7 @@ def __setitem__(self, key, value):
             self.__delitem__(key)
 
         valuetype = type(value).__name__
-        if valuetype not in list(self._SUPPORTED_TYPES.keys()):
+        if valuetype not in self._SUPPORTED_TYPES:
             raise ValueError("Type %s is not supported by SQLiteDict" % valuetype)
 
         if valuetype in self._SERIALIZED_TYPES: