diff --git a/legacy/requirements.txt b/legacy/requirements.txt
index 2a9c809..a673ac2 100644
--- a/legacy/requirements.txt
+++ b/legacy/requirements.txt
@@ -13,4 +13,4 @@ pytz==2017.2
 requests==2.13.0
 six==1.11.0
 tzlocal==1.4
-Werkzeug==0.12.1
+Werkzeug==0.15.3