diff --git a/requirements.txt b/requirements.txt
index ffbe1f1..5ffcf65 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ ncclient==0.6.3
 netmiko==2.3.3
 pyang==1.7.5
 pyats==19.0
-PyYAML==5.1
+PyYAML==5.4
 requests==2.21.0
 urllib3==1.24.1
 virlutils==0.8.4