diff --git a/go.mod b/go.mod
index 670483a..8a47fc0 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/golang/mock v1.5.0
 	github.com/spf13/cobra v1.1.3
 	github.com/stretchr/testify v1.7.0
-	go.octolab.org v0.11.5
+	go.octolab.org v0.12.0
 	go.octolab.org/toolkit/cli v0.6.2
 	go.octolab.org/toolkit/config v0.0.4
 )
diff --git a/go.sum b/go.sum
index dfc70fe..ca1d40f 100644
--- a/go.sum
+++ b/go.sum
@@ -24,7 +24,7 @@ github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
-github.com/brianvoe/gofakeit/v6 v6.0.4/go.mod h1:palrJUk4Fyw38zIFB/uBZqsgzW5VsNllhHKKwAebzew=
+github.com/brianvoe/gofakeit/v6 v6.4.1/go.mod h1:palrJUk4Fyw38zIFB/uBZqsgzW5VsNllhHKKwAebzew=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
@@ -194,8 +194,8 @@ github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.octolab.org v0.9.0/go.mod h1:nGTsvNE5SzxSriL/1u0xl5B+ttjIn9RzIbAhzaKE+Sk=
-go.octolab.org v0.11.5 h1:zN+1dOTFpCmyJq5y0JhLy2bLu3TFEbILavjBx2wuI6A=
-go.octolab.org v0.11.5/go.mod h1:Hl97oqUCvkbdBpFhsU3zUOl3WSkdRUqYab9zwbHCLJY=
+go.octolab.org v0.12.0 h1:NZrvpJvcREBheb3m0ZXvlQbDSHyA6gA352iT37k2+20=
+go.octolab.org v0.12.0/go.mod h1:TEYR7HOfImJq8AsoCcl9JBK+80t4QBY4EilGxMtscNE=
 go.octolab.org/toolkit/cli v0.6.2 h1:oRUvE1T1wAuglqcggKg/F8djTTsRvTwr2eFeJvL6ExE=
 go.octolab.org/toolkit/cli v0.6.2/go.mod h1:iEL6yN6YT3/Sbi19Tl38mn4agRr2yUyiNvbN29iqb/U=
 go.octolab.org/toolkit/config v0.0.4 h1:Q/MnSuRf4ttHCuAaq7PqpD8xQhEtmfK8mO9NX1IxvlA=
diff --git a/internal/cmd/demo/panic.go b/internal/cmd/demo/panic.go
new file mode 100644
index 0000000..61c5ff0
--- /dev/null
+++ b/internal/cmd/demo/panic.go
@@ -0,0 +1,19 @@
+package demo
+
+import "github.com/spf13/cobra"
+
+// Panic returns a demo cobra.Command to raise a panic.
+//
+// 	$ go run main.go panic
+//
+func Panic() *cobra.Command {
+	command := cobra.Command{
+		Use:  "panic",
+		Args: cobra.NoArgs,
+		Run: func(cmd *cobra.Command, args []string) {
+			panic("unexpected panic")
+		},
+	}
+
+	return &command
+}
diff --git a/internal/cmd/root.go b/internal/cmd/root.go
index 16a19e9..dd138f3 100644
--- a/internal/cmd/root.go
+++ b/internal/cmd/root.go
@@ -1,6 +1,10 @@
 package cmd
 
-import "github.com/spf13/cobra"
+import (
+	"github.com/spf13/cobra"
+
+	"tool/internal/cmd/demo"
+)
 
 // New returns the new root command.
 func New() *cobra.Command {
@@ -14,7 +18,11 @@ func New() *cobra.Command {
 		SilenceErrors: false,
 		SilenceUsage:  true,
 	}
+
 	/* configure instance */
-	command.AddCommand( /* related commands */ )
+	command.AddCommand(
+		demo.Panic(),
+	)
+
 	return &command
 }
diff --git a/main.go b/main.go
index c8a1749..80779a7 100644
--- a/main.go
+++ b/main.go
@@ -50,7 +50,8 @@ func main() {
 }
 
 func shutdown(err error) {
-	if recovered, is := errors.Unwrap(err).(errors.Recovered); is {
+	var recovered errors.Recovered
+	if errors.As(err, &recovered) {
 		unsafe.DoSilent(fmt.Fprintf(stderr, "recovered: %+v\n", recovered.Cause()))
 		unsafe.DoSilent(fmt.Fprintln(stderr, "---"))
 		unsafe.DoSilent(fmt.Fprintf(stderr, "%+v\n", err))