diff --git a/requirements.txt b/requirements.txt
index 4bba1da..50c5e18 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,4 +8,4 @@ packaging==16.8
 pyparsing==2.2.0
 requests==2.13.0
 six==1.10.0
-Werkzeug==0.12.1
+Werkzeug==0.15.5