diff --git a/api.py b/api.py
index 6cfee7f..4b70f59 100644
--- a/api.py
+++ b/api.py
@@ -21,7 +21,7 @@ def stats_json():
 @app.route('/rating', methods=['GET'])
 def main():
     rating = defaultdict(int)
-    for doc in mongo.counter_collection.find({}):
+    for doc in mongo.counter_collection.find({"username": {"$ne": None}}):
         rating[doc["username"]] += doc['count']
     rating_list = []
     for user, count in rating.items():