diff --git a/requirements.txt b/requirements.txt
index 26cb093..74c39d6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,5 +39,5 @@ sortedcontainers==2.1.0
 toml==0.10.0
 typed-ast==1.3.1
 urllib3==1.24.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 wrapt==1.11.1