diff --git a/requirements.txt b/requirements.txt
index fa4c5c5..b111d13 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,5 +36,5 @@ six==1.11.0
 travis==0.0.3
 typed-ast==1.1.0
 urllib3==1.24.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 wrapt==1.10.11