diff --git a/requirements.txt b/requirements.txt
index 12e413d..281a06e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-PyYaml==4.2b1
+PyYaml==5.3
 azure-common==1.1.24
 azure-mgmt-dns==3.0.0
 boto3==1.11.0