diff --git a/requirements.txt b/requirements.txt
index a78b49ef51b5a..bb803f56b3550 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ MarkupSafe==0.23
 Pillow==2.7.0
 Python-Chart==1.39
 PyYAML==3.11
-Werkzeug==0.9.6
+Werkzeug==0.15.5
 argparse==1.2.1
 decorator==3.4.0
 docutils==0.12