diff --git a/app/requirements.txt b/app/requirements.txt
old mode 100755
new mode 100644
index 985b65c..96f68fa
--- a/app/requirements.txt
+++ b/app/requirements.txt
@@ -1,3 +1,3 @@
-PyYAML==5.1.2
+PyYAML==5.4
 Flask==1.1.1
 flask-mongoengine==0.9.5
\ No newline at end of file