diff --git a/hack/benchmark/src/singleflight/singleflight_bench_test.go b/hack/benchmark/src/singleflight/singleflight_bench_test.go
index 1f9239d5389..481d39e43de 100644
--- a/hack/benchmark/src/singleflight/singleflight_bench_test.go
+++ b/hack/benchmark/src/singleflight/singleflight_bench_test.go
@@ -24,8 +24,8 @@ import (
 	"time"
 
 	"github.com/vdaas/vald/internal/errors"
-	"github.com/vdaas/vald/internal/sync/singleflight"
 	"github.com/vdaas/vald/internal/sync"
+	"github.com/vdaas/vald/internal/sync/singleflight"
 	stdsingleflight "golang.org/x/sync/singleflight"
 )
 
diff --git a/internal/net/grpc/client.go b/internal/net/grpc/client.go
index 901ecc1d6ed..bfe2b761884 100644
--- a/internal/net/grpc/client.go
+++ b/internal/net/grpc/client.go
@@ -34,10 +34,10 @@ import (
 	"github.com/vdaas/vald/internal/net/grpc/status"
 	"github.com/vdaas/vald/internal/observability/trace"
 	"github.com/vdaas/vald/internal/safety"
-	"github.com/vdaas/vald/internal/sync/singleflight"
 	"github.com/vdaas/vald/internal/strings"
 	sync "github.com/vdaas/vald/internal/sync"
 	"github.com/vdaas/vald/internal/sync/errgroup"
+	"github.com/vdaas/vald/internal/sync/singleflight"
 	"google.golang.org/grpc"
 	gbackoff "google.golang.org/grpc/backoff"
 )
diff --git a/pkg/discoverer/k8s/handler/grpc/handler.go b/pkg/discoverer/k8s/handler/grpc/handler.go
index 03250da98d4..64bef297152 100644
--- a/pkg/discoverer/k8s/handler/grpc/handler.go
+++ b/pkg/discoverer/k8s/handler/grpc/handler.go
@@ -28,8 +28,8 @@ import (
 	"github.com/vdaas/vald/internal/net/grpc/errdetails"
 	"github.com/vdaas/vald/internal/net/grpc/status"
 	"github.com/vdaas/vald/internal/observability/trace"
-	"github.com/vdaas/vald/internal/sync/singleflight"
 	"github.com/vdaas/vald/internal/strings"
+	"github.com/vdaas/vald/internal/sync/singleflight"
 	"github.com/vdaas/vald/pkg/discoverer/k8s/service"
 )