diff --git a/requirements.txt b/requirements.txt
index 9271c4b..8a86b9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,5 +40,5 @@ tornado==5.1.1
 typed-ast==1.2.0
 urllib3==1.24.1
 watchdog==0.9.0
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 wrapt==1.11.1