diff --git a/cmd/dncli/main.go b/cmd/dncli/main.go
index 3e35cac0..fcdf7586 100644
--- a/cmd/dncli/main.go
+++ b/cmd/dncli/main.go
@@ -27,12 +27,20 @@ import (
 	"github.com/dfinance/dnode/x/vmauth"
 )
 
+const (
+	// Default gas for CLI.
+	DefaultGas = 500000
+)
+
 // Entry function for DN CLI.
 func main() {
 	config := sdk.GetConfig()
 	dnConfig.InitBechPrefixes(config)
 	config.Seal()
 
+	// Set default gas.
+	flags.GasFlagVar = flags.GasSetting{Gas: DefaultGas}
+
 	cobra.EnableCommandSorting = false
 	cdc := app.MakeCodec()