diff --git a/ihatemoney/utils.py b/ihatemoney/utils.py
index ea2e3ac9..491eaf07 100644
--- a/ihatemoney/utils.py
+++ b/ihatemoney/utils.py
@@ -24,6 +24,7 @@ from werkzeug.routing import RoutingException
 limiter = limiter = Limiter(
     current_app,
     key_func=get_remote_address,
+    storage_uri="memory://",
 )