diff --git a/requirements.txt b/requirements.txt
index b2ba029..4a7b519 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,4 +35,4 @@ termcolor==1.1.0
 tornado==5.0.2
 traitlets==4.3.2
 wcwidth==0.1.7
-Werkzeug==0.14.1
+Werkzeug==0.15.5