diff --git a/requirements.txt b/requirements.txt
index f14c384..9b84d18 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -78,5 +78,5 @@ traitlets==4.3.2
 typed-ast==1.1.0
 urllib3==1.23
 wcwidth==0.1.7
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 wrapt==1.10.11