diff --git a/requirements.txt b/requirements.txt
index e07c8ce..995ace7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,6 +30,6 @@ six==1.12.0
 SQLAlchemy==1.3.4
 typed-ast==1.3.5
 wcwidth==0.1.7
-Werkzeug==0.15.4
+Werkzeug==0.15.5
 wrapt==1.11.1
 zipp==0.5.1