diff --git a/gqueue/queue.go b/gqueue/queue.go
index 06d1599..6d617d0 100644
--- a/gqueue/queue.go
+++ b/gqueue/queue.go
@@ -38,11 +38,36 @@ func Client() *asynq.Client {
 
 var svc *asynq.Server
 
-func Server() *asynq.Server {
+func ServerWithArgs(concurrency int, fn asynq.ErrorHandlerFunc) *asynq.Server {
 	onceSvc.Do(func() {
 		svc = asynq.NewServer(
 			redisOpt,
-			asynq.Config{Concurrency: 10},
+			asynq.Config{
+				Concurrency:  concurrency,
+				ErrorHandler: fn,
+			},
+		)
+	})
+	return svc
+}
+
+func ServerWithConfig(cfg asynq.Config) *asynq.Server {
+	onceSvc.Do(func() {
+		svc = asynq.NewServer(
+			redisOpt,
+			cfg,
+		)
+	})
+	return svc
+}
+
+func Server() *asynq.Server {
+	onceSvc.Do(func() {
+		svc = asynq.NewServer(
+			redisOpt,
+			asynq.Config{
+				Concurrency: 0,
+			},
 		)
 	})
 	return svc