diff --git a/docs/samples/v1alpha2/custom/kfserving-custom-model/model-server/requirements.txt b/docs/samples/v1alpha2/custom/kfserving-custom-model/model-server/requirements.txt
index e0bf22368..b28d3ca78 100644
--- a/docs/samples/v1alpha2/custom/kfserving-custom-model/model-server/requirements.txt
+++ b/docs/samples/v1alpha2/custom/kfserving-custom-model/model-server/requirements.txt
@@ -14,7 +14,7 @@ google-cloud-core==1.3.0
 google-cloud-storage==1.26.0
 google-resumable-media==0.5.0
 googleapis-common-protos==1.51.0
-idna==2.8
+idna==3.7
 kfserving==0.3.0
 kubernetes==10.0.1
 minio==5.0.7
diff --git a/docs/samples/v1alpha2/custom/kfserving-custom-model/requirements.txt b/docs/samples/v1alpha2/custom/kfserving-custom-model/requirements.txt
index fcb2f0b9f..9e7528763 100644
--- a/docs/samples/v1alpha2/custom/kfserving-custom-model/requirements.txt
+++ b/docs/samples/v1alpha2/custom/kfserving-custom-model/requirements.txt
@@ -21,7 +21,7 @@ google-cloud-core==1.3.0
 google-cloud-storage==1.26.0
 google-resumable-media==0.5.0
 googleapis-common-protos==1.51.0
-idna==2.9
+idna==3.7
 importlib-metadata==1.5.0
 ipykernel==5.1.4
 ipython==7.13.0