diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 994f8da..1fca990
--- a/requirements.txt
+++ b/requirements.txt
@@ -49,7 +49,7 @@ pysnmp==4.3.9
 python-nmap==0.6.1
 pytz==2017.3
 pyvmomi==6.5.0.2017.5.post1
-PyYAML==3.12
+PyYAML==5.1
 redis==2.10.6
 requests==2.18.4
 scandir==1.6