diff --git a/requirements.txt b/requirements.txt
index f60c300..1514f62 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,5 +7,5 @@ pyparsing==2.2.0
 PyJWT==1.5.3
 PyYAML
 six==1.10.0
-Werkzeug==0.12.1
+Werkzeug==0.15.3
 PyNaCl==1.2.1