diff --git a/cmd/notation/policy/show.go b/cmd/notation/policy/show.go
index a25dec489..ea551eff1 100644
--- a/cmd/notation/policy/show.go
+++ b/cmd/notation/policy/show.go
@@ -73,6 +73,6 @@ func runShow(command *cobra.Command, opts showOpts) error {
 
 	// show policy content
 	enc := json.NewEncoder(os.Stdout)
-	enc.SetIndent("", "  ")
+	enc.SetIndent("", "    ")
 	return enc.Encode(&doc)
 }