diff --git a/Makefile b/Makefile
index b16709c..2733cfa 100644
--- a/Makefile
+++ b/Makefile
@@ -19,8 +19,6 @@ testdata/redis:
 testdata/redis/src/redis-server: testdata/redis
 	cd $< && make all
 
-tag:
-	git tag $(VERSION)
-	git tag extra/rediscmd/$(VERSION)
-	git tag extra/redisotel/$(VERSION)
-	git tag extra/rediscensus/$(VERSION)
+fmt:
+	gofmt -w -s ./
+	goimports -w  -local github.com/go-redis/redis ./
diff --git a/cluster_test.go b/cluster_test.go
index 3880d43..6ee7364 100644
--- a/cluster_test.go
+++ b/cluster_test.go
@@ -9,11 +9,11 @@ import (
 	"sync"
 	"time"
 
-	"github.com/go-redis/redis/v8"
-	"github.com/go-redis/redis/v8/internal/hashtag"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
+	"github.com/go-redis/redis/v8/internal/hashtag"
 )
 
 type clusterScenario struct {
diff --git a/command_test.go b/command_test.go
index d110d0c..168f9f6 100644
--- a/command_test.go
+++ b/command_test.go
@@ -4,10 +4,10 @@ import (
 	"errors"
 	"time"
 
-	redis "github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	redis "github.com/go-redis/redis/v8"
 )
 
 var _ = Describe("Cmd", func() {
@@ -72,7 +72,7 @@ var _ = Describe("Cmd", func() {
 	})
 
 	It("supports time.Time", func() {
-		tm := time.Date(2019, 01, 01, 9, 45, 10, 222125, time.UTC)
+		tm := time.Date(2019, 1, 1, 9, 45, 10, 222125, time.UTC)
 
 		err := client.Set(ctx, "time_key", tm, 0).Err()
 		Expect(err).NotTo(HaveOccurred())
diff --git a/commands_test.go b/commands_test.go
index a331f7f..985744c 100644
--- a/commands_test.go
+++ b/commands_test.go
@@ -472,11 +472,11 @@ var _ = Describe("Commands", func() {
 			idleTime := client.ObjectIdleTime(ctx, "key")
 			Expect(idleTime.Err()).NotTo(HaveOccurred())
 
-			//Redis returned milliseconds/1000, which may cause ObjectIdleTime to be at a critical value,
-			//should be +1s to deal with the critical value problem.
-			//if too much time (>1s) is used during command execution, it may also cause the test to fail.
-			//so the ObjectIdleTime result should be <=now-start+1s
-			//link: https://github.com/redis/redis/blob/5b48d900498c85bbf4772c1d466c214439888115/src/object.c#L1265-L1272
+			// Redis returned milliseconds/1000, which may cause ObjectIdleTime to be at a critical value,
+			// should be +1s to deal with the critical value problem.
+			// if too much time (>1s) is used during command execution, it may also cause the test to fail.
+			// so the ObjectIdleTime result should be <=now-start+1s
+			// link: https://github.com/redis/redis/blob/5b48d900498c85bbf4772c1d466c214439888115/src/object.c#L1265-L1272
 			Expect(idleTime.Val()).To(BeNumerically("<=", time.Now().Sub(start)+time.Second))
 		})
 
diff --git a/example/otel/main.go b/example/otel/main.go
index 9bb272e..d92f51d 100644
--- a/example/otel/main.go
+++ b/example/otel/main.go
@@ -4,12 +4,13 @@ import (
 	"context"
 	"sync"
 
-	"github.com/go-redis/redis/extra/redisotel/v8"
-	"github.com/go-redis/redis/v8"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/codes"
 	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
 	sdktrace "go.opentelemetry.io/otel/sdk/trace"
+
+	"github.com/go-redis/redis/extra/redisotel/v8"
+	"github.com/go-redis/redis/v8"
 )
 
 var tracer = otel.Tracer("redisexample")
diff --git a/example/scan-struct/main.go b/example/scan-struct/main.go
index c2f036e..aee7ef7 100644
--- a/example/scan-struct/main.go
+++ b/example/scan-struct/main.go
@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/davecgh/go-spew/spew"
+
 	"github.com/go-redis/redis/v8"
 )
 
diff --git a/extra/rediscensus/rediscensus.go b/extra/rediscensus/rediscensus.go
index 1ea6a57..9af094e 100644
--- a/extra/rediscensus/rediscensus.go
+++ b/extra/rediscensus/rediscensus.go
@@ -3,9 +3,10 @@ package rediscensus
 import (
 	"context"
 
+	"go.opencensus.io/trace"
+
 	"github.com/go-redis/redis/extra/rediscmd/v8"
 	"github.com/go-redis/redis/v8"
-	"go.opencensus.io/trace"
 )
 
 type TracingHook struct{}
diff --git a/extra/rediscmd/safe.go b/extra/rediscmd/safe.go
index efe92f6..6d3a8b7 100644
--- a/extra/rediscmd/safe.go
+++ b/extra/rediscmd/safe.go
@@ -1,3 +1,4 @@
+//go:build appengine
 // +build appengine
 
 package rediscmd
diff --git a/extra/rediscmd/unsafe.go b/extra/rediscmd/unsafe.go
index a90a48b..7ccdf2f 100644
--- a/extra/rediscmd/unsafe.go
+++ b/extra/rediscmd/unsafe.go
@@ -1,3 +1,4 @@
+//go:build !appengine
 // +build !appengine
 
 package rediscmd
diff --git a/extra/redisotel/redisotel.go b/extra/redisotel/redisotel.go
index 3da6113..89fa972 100644
--- a/extra/redisotel/redisotel.go
+++ b/extra/redisotel/redisotel.go
@@ -3,12 +3,13 @@ package redisotel
 import (
 	"context"
 
-	"github.com/go-redis/redis/extra/rediscmd/v8"
-	"github.com/go-redis/redis/v8"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/codes"
 	"go.opentelemetry.io/otel/trace"
+
+	"github.com/go-redis/redis/extra/rediscmd/v8"
+	"github.com/go-redis/redis/v8"
 )
 
 var tracer = otel.Tracer("github.com/go-redis/redis")
diff --git a/fuzz/fuzz.go b/fuzz/fuzz.go
index c849740..3225d24 100644
--- a/fuzz/fuzz.go
+++ b/fuzz/fuzz.go
@@ -1,11 +1,13 @@
+//go:build gofuzz
 // +build gofuzz
 
 package fuzz
 
 import (
 	"context"
-	"github.com/go-redis/redis/v8"
 	"time"
+
+	"github.com/go-redis/redis/v8"
 )
 
 var (
diff --git a/go.mod b/go.mod
index 6852913..8e75291 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,7 @@ go 1.13
 
 require (
 	github.com/cespare/xxhash/v2 v2.1.2
+	github.com/daixiang0/gci v0.2.9 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f
 	github.com/google/go-cmp v0.5.6 // indirect
 	github.com/onsi/ginkgo v1.16.4
diff --git a/go.sum b/go.sum
index d9aec34..123c5e1 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,7 @@
 github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE=
 github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/daixiang0/gci v0.2.9 h1:iwJvwQpBZmMg31w+QQ6jsyZ54KEATn6/nfARbBNW294=
+github.com/daixiang0/gci v0.2.9/go.mod h1:+4dZ7TISfSmqfAGv59ePaHfNzgGtIkHAhhdKggP1JAc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
@@ -73,6 +75,7 @@ golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20201118003311-bd56c0adb394/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/internal/hashtag/hashtag_test.go b/internal/hashtag/hashtag_test.go
index 879e7bf..c0b6396 100644
--- a/internal/hashtag/hashtag_test.go
+++ b/internal/hashtag/hashtag_test.go
@@ -3,10 +3,10 @@ package hashtag
 import (
 	"testing"
 
-	"github.com/go-redis/redis/v8/internal/rand"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8/internal/rand"
 )
 
 func TestGinkgoSuite(t *testing.T) {
diff --git a/internal/hscan/hscan_test.go b/internal/hscan/hscan_test.go
index 1f78bc7..ab4c0e1 100644
--- a/internal/hscan/hscan_test.go
+++ b/internal/hscan/hscan_test.go
@@ -69,7 +69,7 @@ var _ = Describe("Scan", func() {
 			Expect(Scan(&d, i{v}, i{vals[k]})).To(HaveOccurred())
 		}
 
-		//success
+		// success
 		f = func(v uint64) string {
 			return strconv.FormatUint(v, 10)
 		}
diff --git a/internal/pool/pool_test.go b/internal/pool/pool_test.go
index fcb1288..423a783 100644
--- a/internal/pool/pool_test.go
+++ b/internal/pool/pool_test.go
@@ -7,10 +7,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-redis/redis/v8/internal/pool"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8/internal/pool"
 )
 
 var _ = Describe("ConnPool", func() {
diff --git a/internal/proto/scan_test.go b/internal/proto/scan_test.go
index 5df3a6a..55df550 100644
--- a/internal/proto/scan_test.go
+++ b/internal/proto/scan_test.go
@@ -3,9 +3,10 @@ package proto_test
 import (
 	"encoding/json"
 
-	"github.com/go-redis/redis/v8/internal/proto"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8/internal/proto"
 )
 
 type testScanSliceStruct struct {
diff --git a/internal/proto/writer_test.go b/internal/proto/writer_test.go
index c5df9a6..ebae569 100644
--- a/internal/proto/writer_test.go
+++ b/internal/proto/writer_test.go
@@ -6,10 +6,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-redis/redis/v8/internal/proto"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8/internal/proto"
 )
 
 type MyType struct{}
@@ -51,7 +51,7 @@ var _ = Describe("WriteBuffer", func() {
 	})
 
 	It("should append time", func() {
-		tm := time.Date(2019, 01, 01, 9, 45, 10, 222125, time.UTC)
+		tm := time.Date(2019, 1, 1, 9, 45, 10, 222125, time.UTC)
 		err := wr.WriteArgs([]interface{}{tm})
 		Expect(err).NotTo(HaveOccurred())
 
diff --git a/internal/safe.go b/internal/safe.go
index 862ff0e..fd2f434 100644
--- a/internal/safe.go
+++ b/internal/safe.go
@@ -1,3 +1,4 @@
+//go:build appengine
 // +build appengine
 
 package internal
diff --git a/internal/unsafe.go b/internal/unsafe.go
index 4bc7970..9f2e418 100644
--- a/internal/unsafe.go
+++ b/internal/unsafe.go
@@ -1,3 +1,4 @@
+//go:build !appengine
 // +build !appengine
 
 package internal
diff --git a/internal/util/safe.go b/internal/util/safe.go
index 1b3060e..2130711 100644
--- a/internal/util/safe.go
+++ b/internal/util/safe.go
@@ -1,3 +1,4 @@
+//go:build appengine
 // +build appengine
 
 package util
diff --git a/internal/util/unsafe.go b/internal/util/unsafe.go
index c9868aa..daa8d76 100644
--- a/internal/util/unsafe.go
+++ b/internal/util/unsafe.go
@@ -1,3 +1,4 @@
+//go:build !appengine
 // +build !appengine
 
 package util
diff --git a/iterator_test.go b/iterator_test.go
index 7a64f02..68c8b77 100644
--- a/iterator_test.go
+++ b/iterator_test.go
@@ -3,10 +3,10 @@ package redis_test
 import (
 	"fmt"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 var _ = Describe("ScanIterator", func() {
diff --git a/main_test.go b/main_test.go
index 0cb2b1d..5414310 100644
--- a/main_test.go
+++ b/main_test.go
@@ -12,10 +12,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 const (
@@ -295,7 +295,7 @@ func redisDir(port string) (string, error) {
 	if err := os.RemoveAll(dir); err != nil {
 		return "", err
 	}
-	if err := os.MkdirAll(dir, 0775); err != nil {
+	if err := os.MkdirAll(dir, 0o775); err != nil {
 		return "", err
 	}
 	return dir, nil
diff --git a/options_test.go b/options_test.go
index 9ffc6fc..6b5c453 100644
--- a/options_test.go
+++ b/options_test.go
@@ -1,3 +1,4 @@
+//go:build go1.7
 // +build go1.7
 
 package redis
diff --git a/pipeline_test.go b/pipeline_test.go
index 9d2a60c..f24114d 100644
--- a/pipeline_test.go
+++ b/pipeline_test.go
@@ -3,10 +3,10 @@ package redis_test
 import (
 	"strconv"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 var _ = Describe("pipelining", func() {
diff --git a/pool_test.go b/pool_test.go
index 08acc6d..dbef72e 100644
--- a/pool_test.go
+++ b/pool_test.go
@@ -4,10 +4,10 @@ import (
 	"context"
 	"time"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 var _ = Describe("pool", func() {
diff --git a/pubsub_test.go b/pubsub_test.go
index 3e0bf9b..2dfa66b 100644
--- a/pubsub_test.go
+++ b/pubsub_test.go
@@ -7,10 +7,10 @@ import (
 	"sync"
 	"time"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 var _ = Describe("PubSub", func() {
diff --git a/race_test.go b/race_test.go
index c9428d9..34699d1 100644
--- a/race_test.go
+++ b/race_test.go
@@ -10,10 +10,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 var _ = Describe("races", func() {
diff --git a/redis_test.go b/redis_test.go
index 9f18905..05c6d79 100644
--- a/redis_test.go
+++ b/redis_test.go
@@ -8,10 +8,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 type redisHookError struct {
diff --git a/ring.go b/ring.go
index 5e35b6b..11a2037 100644
--- a/ring.go
+++ b/ring.go
@@ -12,7 +12,8 @@ import (
 	"time"
 
 	"github.com/cespare/xxhash/v2"
-	"github.com/dgryski/go-rendezvous"
+	rendezvous "github.com/dgryski/go-rendezvous" //nolint
+
 	"github.com/go-redis/redis/v8/internal"
 	"github.com/go-redis/redis/v8/internal/hashtag"
 	"github.com/go-redis/redis/v8/internal/pool"
diff --git a/ring_test.go b/ring_test.go
index 2189cd6..03a49fd 100644
--- a/ring_test.go
+++ b/ring_test.go
@@ -9,10 +9,10 @@ import (
 	"sync"
 	"time"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 var _ = Describe("Redis Ring", func() {
@@ -190,8 +190,8 @@ var _ = Describe("Redis Ring", func() {
 
 	Describe("Process hook", func() {
 		BeforeEach(func() {
-			//the health check leads to data race for variable "stack []string".
-			//here, the health check time is set to 72 hours to avoid health check
+			// the health check leads to data race for variable "stack []string".
+			// here, the health check time is set to 72 hours to avoid health check
 			opt := redisRingOptions()
 			opt.HeartbeatFrequency = 72 * time.Hour
 			ring = redis.NewRing(opt)
diff --git a/sentinel_test.go b/sentinel_test.go
index 7b4aabd..754f33d 100644
--- a/sentinel_test.go
+++ b/sentinel_test.go
@@ -3,10 +3,10 @@ package redis_test
 import (
 	"net"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 var _ = Describe("Sentinel", func() {
diff --git a/tx_test.go b/tx_test.go
index 4681122..7deb2df 100644
--- a/tx_test.go
+++ b/tx_test.go
@@ -5,10 +5,10 @@ import (
 	"strconv"
 	"sync"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 var _ = Describe("Tx", func() {