diff --git a/requirements.txt b/requirements.txt
index 538284b..15a46ce 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
   
 gunicorn==19.6.0
 Flask==1.0
+werkzeug>=2.2.3 # not directly required, pinned by Snyk to avoid a vulnerability