diff --git a/requirements.txt b/requirements.txt
index 580269c..fe557d4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,4 +20,4 @@ six==1.12.0
 slackclient==1.3.1
 urllib3==1.24.1
 websocket-client==0.54.0
-Werkzeug==0.14.1
+Werkzeug==0.15.5