diff --git a/app/requirements.txt b/app/requirements.txt
old mode 100755
new mode 100644
index ec5ac5c..c949870
--- a/app/requirements.txt
+++ b/app/requirements.txt
@@ -1,4 +1,4 @@
-PyYAML==5.1.2
+PyYAML==5.4
 Flask==1.1.1
 Flask-SQLAlchemy==2.4.1
 Flask-Migrate==2.5.2