diff --git a/04 Linking Containers With Docker Networks/requirements.txt b/04 Linking Containers With Docker Networks/requirements.txt
index d1772a0..c03c26d 100644
--- a/04 Linking Containers With Docker Networks/requirements.txt	
+++ b/04 Linking Containers With Docker Networks/requirements.txt	
@@ -1,2 +1,3 @@
 Flask==0.12
 flask-redis==0.3
+werkzeug>=2.2.3 # not directly required, pinned by Snyk to avoid a vulnerability