diff --git a/luigi/requirements.txt b/luigi/requirements.txt
old mode 100755
new mode 100644
index 74dca85..dd8c7c7
--- a/luigi/requirements.txt
+++ b/luigi/requirements.txt
@@ -101,5 +101,5 @@ unidiff==0.5.4
 urllib3==1.22
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 widgetsnbextension==3.0.8