diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index f528eec..fba15cf
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ pyasn1-modules==0.2.7
 pyparsing==2.4.5
 python-dateutil==2.8.1
 pytz==2019.3
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 requests-oauthlib==1.3.0
 rsa==4.0