diff --git a/docs/samples/custom/kfserving-custom-model/model-server/requirements.txt b/docs/samples/custom/kfserving-custom-model/model-server/requirements.txt
index 2bd6b74..d8728bc 100644
--- a/docs/samples/custom/kfserving-custom-model/model-server/requirements.txt
+++ b/docs/samples/custom/kfserving-custom-model/model-server/requirements.txt
@@ -28,7 +28,7 @@ pycparser==2.19
 PyJWT==1.7.1
 python-dateutil==2.8.1
 pytz==2019.3
-PyYAML==5.3
+PyYAML==5.4
 requests==2.22.0
 requests-oauthlib==1.3.0
 rsa==4.0