diff --git a/requirements.txt b/requirements.txt
index bd09390..1c02fd7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -69,5 +69,5 @@ virtualenv==16.7.5
 visitor==0.1.3
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 wrapt==1.11.2