diff --git a/tox.ini b/tox.ini
index 4bfaaed1..a88f5fff 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@ deps =
     blinker
     python-dotenv
 
-    lowest: Werkzeug==0.9
+    lowest: Werkzeug==0.14
     lowest: Jinja2==2.4
     lowest: itsdangerous==0.21
     lowest: Click==4.0