diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 780c9bd..34fe68a
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ python-keystoneclient==3.10.0
 python-novaclient==8.0.0
 python-openstackclient==3.11.0
 pytz==2017.2
-PyYAML==3.12
+PyYAML==5.4
 requests==2.17.3
 requestsexceptions==1.2.0
 rfc3986==1.0.0