diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index d17da41..dcc32a9
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ cryptography==2.7
 click==7.0
 Flask==1.1.1
 pytz==2019.2
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 SQLAlchemy==1.3.6
 SQLAlchemy-Utils==0.34.1