diff --git a/requirements.txt b/requirements.txt
index 852ebba..0f30667 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,4 +13,4 @@ requests==2.21.0
 six==1.12.0
 twilio==6.25.2
 urllib3==1.24.1
-Werkzeug==0.15.1
+Werkzeug==0.15.3