diff --git a/requirements.txt b/requirements.txt
index e71f757..3d50fe6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -122,7 +122,7 @@ typed-ast==1.3.4
 urllib3==1.23
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.15.2
+Werkzeug==0.15.3
 widgetsnbextension==3.4.1