diff --git a/day-21/requirements.txt b/day-21/requirements.txt
index 31717cedd..08a66df78 100644
--- a/day-21/requirements.txt
+++ b/day-21/requirements.txt
@@ -1 +1,2 @@
-Flask==2.0.1
+Flask==2.0.3
+Werkzeug==2.0.3