diff --git a/requirements.txt b/requirements.txt
index dc462606..fea12340 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,6 +23,6 @@ reportlab==3.3.0
 simplegeneric==0.8.1
 six==1.10.0
 traitlets==4.0.0
-Werkzeug==0.11.2
+Werkzeug==0.15.3
 xhtml2pdf==0.0.6
 MySQL-python==1.2.5