diff --git a/components/guns/grpc/core.go b/components/guns/grpc/core.go
index 30f26f9b8..d38e56faa 100644
--- a/components/guns/grpc/core.go
+++ b/components/guns/grpc/core.go
@@ -66,14 +66,16 @@ type Gun struct {
 	answLog *zap.Logger
 }
 
-func DefaultGunConfig() GunConfig {
-	return GunConfig{
-		Target: "default target",
-		AnswLog: AnswLogConfig{
-			Enabled: false,
-			Path:    "answ.log",
-			Filter:  "all",
-		},
+func DefaultGunConfig() func() GunConfig {
+	return func() GunConfig {
+		return GunConfig{
+			Target: "default target",
+			AnswLog: AnswLogConfig{
+				Enabled: false,
+				Path:    "answ.log",
+				Filter:  "all",
+			},
+		}
 	}
 }