diff --git a/goblin/app.py b/goblin/app.py
index 74bd979b37f980fcbad43f5030f24b2c1f8fafd8..520919cc6a73fe12bcaaebd28d4d7d47b78597ed 100644
--- a/goblin/app.py
+++ b/goblin/app.py
@@ -42,7 +42,7 @@ async def create_app(url, loop, **config):
     features = {}
     async with await driver.GremlinServer.open(url, loop) as conn:
         # Propbably just use a parser to parse the whole feature list
-        aliases = config.get('aliases', None)
+        aliases = config.get('aliases', {})
         stream = await conn.submit(
             'graph.features().graph().supportsComputer()', aliases=aliases)
         msg = await stream.fetch_data()