diff --git a/pokedex/db/__init__.py b/pokedex/db/__init__.py
index 0da8713..13e9a19 100644
--- a/pokedex/db/__init__.py
+++ b/pokedex/db/__init__.py
@@ -15,7 +15,7 @@ def connect(uri=None, session_args={}, engine_args={}, engine_prefix=''):
 
     # If we didn't get a uri, fall back to the default
     if uri is None:
-        uri = engine_args[engine_prefix + 'url']
+        uri = engine_args.get(engine_prefix + 'url', None)
     if uri is None:
         uri = get_default_db_uri()