diff --git a/db.sqlite3 b/db.sqlite3
old mode 100644
new mode 100755
index 80976ba..9fb1a4c
Binary files a/db.sqlite3 and b/db.sqlite3 differ
diff --git a/mocha_server.py b/mocha_server.py
index 80c5aad..41456b0 100755
--- a/mocha_server.py
+++ b/mocha_server.py
@@ -158,7 +158,7 @@ def update(user_id, score):
     conn.commit()
     conn.close()
 
-    return []
+    return '[]'
 
 
 def process_request(uri):