diff --git a/sample-tracking-api/requirements.txt b/sample-tracking-api/requirements.txt
old mode 100755
new mode 100644
index f7b0503..396ff6f
--- a/sample-tracking-api/requirements.txt
+++ b/sample-tracking-api/requirements.txt
@@ -38,7 +38,7 @@ python-dateutil==2.8.0
 python-editor==1.0.4
 python-ldap==3.3.1
 pytz==2020.1
-PyYAML==5.3.1
+PyYAML==5.4
 requests==2.24.0
 six==1.15.0
 SQLAlchemy==1.3.18