diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index c604ce56..43aad3e8
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ Flask-SQLAlchemy==1.0
 Flask-Script==0.6.6
 Flask-Babel==0.9
 toml==0.8.2
-PyYAML==3.10
+PyYAML==5.4
 gunicorn==19.1.1
 lever==0.2.6
 redis==2.10.3