diff --git a/requirements.txt b/requirements.txt
index 6a99fca..8ba5b88 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,4 +15,4 @@ python-telegram-bot==5.3.0
 requests==2.13.0
 six==1.10.0
 urllib3==1.20
-Werkzeug==0.12.1
+Werkzeug==0.15.3