diff --git a/requirements.txt b/requirements.txt
index 46a2195..74294e6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,4 +22,4 @@ relativetimebuilder==0.2.0
 requests==2.21.0
 six==1.12.0
 urllib3==1.24.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3