diff --git a/requirements.txt b/requirements.txt
index 4c2caa95e..6ab664aa8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -49,6 +49,6 @@ traitlets==4.3.2
 typed-ast==1.1.0
 urllib3==1.23
 wcwidth==0.1.7
-Werkzeug==0.14.1
+Werkzeug==0.15.6
 wrapt==1.10.11
-xlrd>= 1.0.0
\ No newline at end of file
+xlrd>= 1.0.0