diff --git a/requirements.txt b/requirements.txt
index a352ec9..902d4f4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ MarkupSafe==0.23
 Pillow==2.3.0
 PyYAML==3.10
 WTForms==1.0.1
-Werkzeug==0.11.15
+Werkzeug==0.15.3
 argparse==1.2.1
 certifi==2017.1.23
 click==6.7