diff --git a/requirements.txt b/requirements.txt
index 6a2e54ea..8ae5420f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -75,7 +75,7 @@ userbase==1.1.1
 wcwidth==0.1.7
 WeasyPrint==0.42.3
 webencodings==0.5.1
-Werkzeug==0.11.6
+Werkzeug==0.15.3
 WTForms==2.1
 xhtml2pdf==0.0.6
 xlwt==1.0.0