diff --git a/requirements.txt b/requirements.txt
index 3f09dd8..14b5f1c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,6 +22,6 @@ requests==2.18.4
 six==1.11.0
 urllib3==1.22
 visitor==0.1.3
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 WTForms==2.1
 XlsxWriter==1.0.2