diff --git a/test/login_logout/requirements.txt b/test/login_logout/requirements.txt
index 763ef07295ca07b48e6d6ec65a5f64102a81a3e2..07702783b7c983f140069615b8113797771a152c 100644
--- a/test/login_logout/requirements.txt
+++ b/test/login_logout/requirements.txt
@@ -1,2 +1,3 @@
 Flask
 Flask-OAuthlib
+Werkzeug==0.16.1 # Due to bug: cannot find url_quote