diff --git a/.circleci/config.yml b/.circleci/config.yml
index df2b413..5053591 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,7 +1,7 @@
 alias:
   default: &default
     docker:
-      - image: circleci/go:1.19
+      - image: cimg/go:1.20.2
         environment:
           GO111MODULE: "on"
           REPO_NAME: "kpango"
diff --git a/Makefile b/Makefile
index 88ba78b..cfadc31 100644
--- a/Makefile
+++ b/Makefile
@@ -2,6 +2,10 @@ GO_VERSION:=$(shell go version)
 
 .PHONY: all clean bench bench-all profile lint test contributors update install
 
+
+GOPATH := $(eval GOPATH := $(shell go env GOPATH))$(GOPATH)
+GOLINES_MAX_WIDTH     ?= 200
+
 all: clean install lint test bench
 
 clean:
@@ -54,3 +58,9 @@ contributors:
 
 run:
 	go run example/main.go
+
+format:
+	find ./ -type d -name .git -prune -o -type f -regex '.*[^\.pb]\.go' -print | xargs $(GOPATH)/bin/golines -w -m $(GOLINES_MAX_WIDTH)
+	find ./ -type d -name .git -prune -o -type f -regex '.*[^\.pb]\.go' -print | xargs $(GOPATH)/bin/gofumpt -w
+	find ./ -type d -name .git -prune -o -type f -regex '.*[^\.pb]\.go' -print | xargs $(GOPATH)/bin/strictgoimports -w
+	find ./ -type d -name .git -prune -o -type f -regex '.*\.go' -print | xargs $(GOPATH)/bin/goimports -w
diff --git a/example/main.go b/example/main.go
index 0523762..e2a3582 100644
--- a/example/main.go
+++ b/example/main.go
@@ -19,7 +19,7 @@ func main() {
 		value3 = struct{}{}
 	)
 
-	gc := gache.New[any]().SetDefaultExpire(time.Second * 10)
+	gc := gache.New[any]().SetDefaultExpire(time.Second*10).StartExpired(context.Background(), time.Hour)
 
 	// store with expire setting
 	gc.SetWithExpire(key1, value1, time.Second*30)
@@ -52,6 +52,7 @@ func main() {
 	}
 	gc.Write(context.Background(), file)
 
+	gc.Stop()
 	file.Close()
 
 	gcn := gache.New[any]().SetDefaultExpire(time.Minute)
diff --git a/gache.go b/gache.go
index 4a0e8ae..e5d350a 100644
--- a/gache.go
+++ b/gache.go
@@ -63,7 +63,7 @@ type (
 		expFuncEnabled bool
 		expire         int64
 		l              uint64
-		cancel         atomic.Value
+		cancel         atomic.Pointer[context.CancelFunc]
 		expGroup       singleflight.Group
 		expChan        chan string
 		expFunc        func(context.Context, string)
@@ -150,7 +150,7 @@ func (g *gache[V]) StartExpired(ctx context.Context, dur time.Duration) Gache[V]
 	go func() {
 		tick := time.NewTicker(dur)
 		ctx, cancel := context.WithCancel(ctx)
-		g.cancel.Store(cancel)
+		g.cancel.Store(&cancel)
 		for {
 			select {
 			case <-ctx.Done():
@@ -350,9 +350,8 @@ func (g *gache[V]) Read(r io.Reader) error {
 // Stop kills expire daemon
 func (g *gache[V]) Stop() {
 	if c := g.cancel.Load(); c != nil {
-		if cancel, ok := c.(context.CancelFunc); ok && cancel != nil {
-			cancel()
-		}
+		cancel := *c
+		cancel()
 	}
 }
 
diff --git a/go.mod b/go.mod
index 97a8caf..5f838c4 100644
--- a/go.mod
+++ b/go.mod
@@ -1,13 +1,13 @@
 module github.com/kpango/gache/v2
 
-go 1.19
+go 1.20
 
 require (
 	github.com/cornelk/hashmap v1.0.8
-	github.com/kpango/fastime v1.1.4
-	github.com/kpango/glg v1.6.13
+	github.com/kpango/fastime v1.1.7
+	github.com/kpango/glg v1.6.14
 	github.com/zeebo/xxh3 v1.0.2
-	golang.org/x/sync v0.0.0-20220907140024-f12130a52804
+	golang.org/x/sync v0.1.0
 )
 
 require (
diff --git a/go.sum b/go.sum
index 231b0cc..c3a91eb 100644
--- a/go.sum
+++ b/go.sum
@@ -4,10 +4,10 @@ github.com/goccy/go-json v0.9.11 h1:/pAaQDLHEoCq/5FFmSKBswWmK6H0e8g4159Kc/X/nqk=
 github.com/goccy/go-json v0.9.11/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/klauspost/cpuid/v2 v2.0.9 h1:lgaqFMSdTdQYdZ04uHyN2d/eKdOMyi2YLSvlQIBFYa4=
 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
-github.com/kpango/fastime v1.1.4 h1:pus9JgJBg/8Jie3ozayA4yNIV67BUPhbq0wMZY3CtYo=
-github.com/kpango/fastime v1.1.4/go.mod h1:tTNDbIo5qL6D7g5vh2YbkyUbOVP2kD/we3rSjN22PMY=
-github.com/kpango/glg v1.6.13 h1:QMhxOm/Oo1k8qraMtH4SQOYIgB/SI2RW2Hvrn1kgAZw=
-github.com/kpango/glg v1.6.13/go.mod h1:fwP/c6NJTXe0vd9L3He6myDnO33lFVfgQGtGmlMnyws=
+github.com/kpango/fastime v1.1.7 h1:xaWENHzTrfzAmqhLayoLVJFF0MBf1EGZL9FL6V/OyDo=
+github.com/kpango/fastime v1.1.7/go.mod h1:vyD7FnUn08zxY4b/QFBZVG+9EWMYsNl+QF0uE46urD4=
+github.com/kpango/glg v1.6.14 h1:Ss3ZvTQ23blUCDYizSAijiFTZsgGeYr/lanUGgQ10rY=
+github.com/kpango/glg v1.6.14/go.mod h1:2djk7Zr4zKIYPHlORH8tJVlhCEh+XXW8W4K3qJyNXMI=
 github.com/sirupsen/logrus v1.9.0 h1:trlNQbNUG3OdDrDil03MCb1H2o9nJ1x4/5LYw7byDE0=
 github.com/zeebo/assert v1.3.0 h1:g7C04CbJuIDKNPFHmsk4hwZDO5O+kntRxzaUoNXj+IQ=
 github.com/zeebo/xxh3 v1.0.2 h1:xZmwmqxHZA8AI603jOQ0tMqmBr9lPeFwGg6d+xy9DC0=
@@ -15,6 +15,6 @@ github.com/zeebo/xxh3 v1.0.2/go.mod h1:5NWz9Sef7zIDm2JHfFlcQvNekmcEl9ekUZQQKCYaD
 go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
 go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
 go.uber.org/zap v1.23.0 h1:OjGQ5KQDEUawVHxNwQgPpiypGHOxo2mNZsOqTak4fFY=
-golang.org/x/sync v0.0.0-20220907140024-f12130a52804 h1:0SH2R3f1b1VmIMG7BXbEZCBUu2dKmHschSmjqGUrW8A=
-golang.org/x/sync v0.0.0-20220907140024-f12130a52804/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 h1:0A+M6Uqn+Eje4kHMK80dtF3JCXC4ykBgQG4Fe06QRhQ=