diff --git a/requirements.txt b/requirements.txt
index 53a1f73..60ad4da 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,5 +39,5 @@ summa==0.0.7
 textteaser==0.3
 treq==16.12.0
 Twisted==16.6.0
-Werkzeug==0.11.13
+Werkzeug==0.15.3
 zope.interface==4.3.3