diff --git a/requirements.txt b/requirements.txt
index a5c73d8..3a50c1d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,4 +14,4 @@ requests==2.21.0
 six==1.12.0
 twilio==6.24.1
 urllib3==1.24.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3