diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 9c903fa..dbdfd19
--- a/requirements.txt
+++ b/requirements.txt
@@ -111,5 +111,5 @@ tqdm==4.11.2
 traitlets==4.3.2
 wcwidth==0.1.7
 webencodings==0.5
-Werkzeug==0.11.15
+Werkzeug==0.15.3
 widgetsnbextension==3.1.0