diff --git a/requirements.txt b/requirements.txt
index b373d20b..e4b14af6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -69,7 +69,7 @@ python-hostlist==1.17
 python-keystoneclient==3.10.0
 python-novaclient==7.1.0
 pytz==2016.10
-PyYAML==3.12
+PyYAML==5.4
 requests==2.13.0
 rfc3986==0.4.1
 sandman==0.9.8
diff --git a/requirements3.txt b/requirements3.txt
index f72bd941..a7f58aa6 100644
--- a/requirements3.txt
+++ b/requirements3.txt
@@ -62,7 +62,7 @@ python-hostlist==1.16
 python-keystoneclient==3.5.0
 python-novaclient==6.0.0
 pytz==2016.7
-PyYAML==3.12
+PyYAML==5.4
 requests==2.11.1
 rfc3986==0.4.1
 sandman==0.9.8