diff --git a/app.py b/app.py
index 6d7ae65..abf3499 100644
--- a/app.py
+++ b/app.py
@@ -30,7 +30,7 @@
 # app init
 app = Flask(__name__)
 app.rdb = rdb = RedisIO(config.REDIS_URL)
-app.mdb = mdb = PyMongo(app, config.MONGO_URL).db
+app.mdb = mdb = PyMongo(app, config.MONGO_URL + "?retryWrites=false").db
 
 CORS(app)