diff --git a/requirements.txt b/requirements.txt
index 17c3af6..60f5178 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -116,7 +116,7 @@ typed-ast==1.3.1
 urllib3==1.24.1
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 widgetsnbextension==3.4.2
 win-inet-pton==1.1.0
 wincertstore==0.2