diff --git a/cmd/root.go b/cmd/root.go
index 2b802a9..fe75169 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -36,7 +36,7 @@ func init() {
 
 	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "show more verbose output")
 	rootCmd.Flags().BoolVarP(&skipVerify, "insecure", "k", false, "permit operations for servers otherwise considered insecure")
-	rootCmd.Flags().BoolVarP(&grpcFlag, "grpc", "g", false, "use http2 transport for grpc health check")
+	rootCmd.Flags().BoolVarP(&grpcFlag, "grpc", "g", false, "use grpc health to check a grpc service")
 }
 
 func initEnvs() {