diff --git a/assignment3/requirements.txt b/assignment3/requirements.txt
old mode 100755
new mode 100644
index 83804c2..ea4231e
--- a/assignment3/requirements.txt
+++ b/assignment3/requirements.txt
@@ -69,5 +69,5 @@ tornado==6.0.2
 traitlets==4.3.2
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.15.2
+Werkzeug==0.15.3
 widgetsnbextension==3.4.2