diff --git a/phenopipe-web/requirements.txt b/phenopipe-web/requirements.txt
index 9a5ed07..a36c13b 100644
--- a/phenopipe-web/requirements.txt
+++ b/phenopipe-web/requirements.txt
@@ -66,5 +66,5 @@ tzlocal==1.4
 urllib3==1.22
 WeasyPrint==0.33
 webencodings==0.5
-Werkzeug==0.11.11
+Werkzeug==0.15.3
 zipstream==1.1.4