diff --git a/tests/requirements/reqs-flask-2.1.txt b/tests/requirements/reqs-flask-2.1.txt
index 84d89b8b9..6acf72eb6 100644
--- a/tests/requirements/reqs-flask-2.1.txt
+++ b/tests/requirements/reqs-flask-2.1.txt
@@ -1,4 +1,5 @@
 Flask>=2.1,<2.2
+Werkzeug<3
 blinker>=1.1
 itsdangerous
 -r reqs-base.txt
diff --git a/tests/requirements/reqs-flask-2.2.txt b/tests/requirements/reqs-flask-2.2.txt
index 0b244a851..e6307fded 100644
--- a/tests/requirements/reqs-flask-2.2.txt
+++ b/tests/requirements/reqs-flask-2.2.txt
@@ -1,4 +1,5 @@
 Flask>=2.2,<2.3
+Werkzeug<3
 blinker>=1.1
 itsdangerous
 -r reqs-base.txt