diff --git a/go.mod b/go.mod
index aac0ed1..dc71250 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	github.com/modernprogram/groupcache/v2 v2.6.0
 	github.com/prometheus/client_golang v1.19.0
 	github.com/udhos/kube v0.0.1
-	github.com/udhos/kubepodinformer v0.0.3
+	github.com/udhos/kubepodinformer v0.1.0
 	k8s.io/client-go v0.29.3
 )
 
diff --git a/go.sum b/go.sum
index b7c6d64..88d93eb 100644
--- a/go.sum
+++ b/go.sum
@@ -90,8 +90,8 @@ github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsT
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/udhos/kube v0.0.1 h1:FFWNyn+xf4aHZTaldKZuueu6ZQqmJR76I4OrfeJo9W4=
 github.com/udhos/kube v0.0.1/go.mod h1:UgnFniZC6fLV5vEvAqpDvN+rY+aQJwzRM1ejhK2yzEI=
-github.com/udhos/kubepodinformer v0.0.3 h1:3q2egWSGd5eVLX5wkyGSJkF8G4LNgNjS/G2tLNVwlPI=
-github.com/udhos/kubepodinformer v0.0.3/go.mod h1:oJhuMPdLeCtMT9KdotLkjIE+eByH9cPhMX2GPrB2l0k=
+github.com/udhos/kubepodinformer v0.1.0 h1:jgloet7tCnXnsMhOp2CI0o6jnQtE+2Wros+/rem2GEc=
+github.com/udhos/kubepodinformer v0.1.0/go.mod h1:rSYevK46dWPXOmhvnG0FFkPDYHvOUxkeV4Nsz+OHpIY=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
diff --git a/kubegroup/kubegroup.go b/kubegroup/kubegroup.go
index 24ce210..9c5c277 100644
--- a/kubegroup/kubegroup.go
+++ b/kubegroup/kubegroup.go
@@ -78,11 +78,13 @@ type Options struct {
 	// Pool is an interface to plug in a target for delivering peering
 	// updates. *groupcache.HTTPPool, created with
 	// groupcache.NewHTTPPoolOpts(), implements this interface.
+	// Pool supports groupcache2.
 	Pool PeerGroup
 
 	// PeerSet is an interface to plug in a target for delivering peering
 	// updates. *groupcache.Daemon, created with
 	// groupcache.ListenAndServe(), implements this interface.
+	// PeerSet supports groupcache3.
 	Peers PeerSet
 
 	// Client provides kubernetes client.
@@ -215,6 +217,10 @@ func (g *Group) onUpdate(pods []podinformer.Pod) {
 
 	if g.options.Peers != nil {
 
+		//
+		// groupcache3
+		//
+
 		peers := make([]peer.Info, 0, size)
 
 		for i, p := range pods {
@@ -238,6 +244,11 @@ func (g *Group) onUpdate(pods []podinformer.Pod) {
 		}
 
 	} else {
+
+		//
+		// groupcache2
+		//
+
 		peers := make([]string, 0, size)
 
 		for i, p := range pods {