diff --git a/requirements.txt b/requirements.txt
index badb0a8..3552fb6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -126,6 +126,6 @@ traits==5.2.0
 urllib3==1.24.1
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.14.1
+Werkzeug==0.15.5
 widgetsnbextension==3.4.2
 zipp==0.3.3