diff --git a/requirements.txt b/requirements.txt
index 22345a3..46d9036 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,4 +25,4 @@ requests==2.18.4
 six==1.11.0
 twilio==6.9.1
 urllib3==1.22
-Werkzeug==0.12.2
+Werkzeug==0.15.3