diff --git a/10.program-structure/requirements.txt b/10.program-structure/requirements.txt
old mode 100755
new mode 100644
index 3de814b..2da3b75
--- a/10.program-structure/requirements.txt
+++ b/10.program-structure/requirements.txt
@@ -18,5 +18,5 @@ python-editor==1.0.3
 six==1.10.0
 SQLAlchemy==1.1.11
 visitor==0.1.3
-Werkzeug==0.12.2
+Werkzeug==0.15.3
 WTForms==2.1