diff --git a/petrarch/requirements.txt b/petrarch/requirements.txt
old mode 100755
new mode 100644
index 610a4d8..2e569d9
--- a/petrarch/requirements.txt
+++ b/petrarch/requirements.txt
@@ -7,4 +7,4 @@ Jinja2==2.7.3
 MarkupSafe==0.23
 tornado==4.2
 simplejson==3.6.5
-Werkzeug==0.10.4
+Werkzeug==0.15.3