diff --git a/.github/workflows/CI.yaml b/.github/workflows/CI.yaml
index 9c1ef04..1219730 100644
--- a/.github/workflows/CI.yaml
+++ b/.github/workflows/CI.yaml
@@ -12,8 +12,6 @@ jobs:
   ci:
     name: CI check on every push
     runs-on: ubuntu-latest
-    container:
-      image: centos:centos7
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -25,9 +23,7 @@ jobs:
 
       - name: Setup necessary packages
         run: |
-          yum install epel-release -y
-          yum groupinstall 'Development Tools' -y
-          yum install libaom-devel -y
+          sudo apt install libvips-dev -y
 
       - name: run test cases
         run: make test && make
@@ -81,17 +77,17 @@ jobs:
         id: trivy
         with:
           run: |
-            trivy image --no-progress --severity "HIGH,CRITICAL" ghcr.io/${{ github.event.repository.full_name }}
+            trivy image --no-progress --severity "HIGH,CRITICAL" --ignore-unfixed ghcr.io/${{ github.event.repository.full_name }}
       
       - name: Print CVE
         run: |
           echo "${{ steps.trivy.outputs.stdout }}"
 
       - name: Comment PR
-        uses: thollander/actions-comment-pull-request@v1
+        uses: thollander/actions-comment-pull-request@v2
         with:
           message: |
             ```
             ${{ steps.trivy.outputs.stdout }}
             ```
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
\ No newline at end of file
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 87ce3ab..edbca9b 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/release_binary.yaml b/.github/workflows/release_binary.yaml
index cbcd48b..35c1e1d 100644
--- a/.github/workflows/release_binary.yaml
+++ b/.github/workflows/release_binary.yaml
@@ -13,9 +13,6 @@ jobs:
   build:
     name: Create Release
     runs-on: ubuntu-latest
-    container:
-      image: centos:centos7
-
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
@@ -27,9 +24,7 @@ jobs:
       
       - name: Setup necessary packages
         run: |
-          yum install epel-release -y
-          yum groupinstall 'Development Tools' -y
-          yum install libaom-devel -y
+          sudo apt install libvips-dev -y
 
       - name: Make WebP Server Go
         run: |
diff --git a/Dockerfile b/Dockerfile
index a2d4314..4439fa2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM golang:1.20 as builder
 
 ARG IMG_PATH=/opt/pics
 ARG EXHAUST_PATH=/opt/exhaust
-RUN apt update && apt install libaom-dev -y && mkdir /build
+RUN apt update && apt install --no-install-recommends libvips-dev -y && mkdir /build
 COPY go.mod /build
 RUN cd /build && go mod download
 
@@ -14,11 +14,11 @@ RUN cd /build && sed -i "s|.\/pics|${IMG_PATH}|g" config.json  \
 
 FROM debian:bullseye-slim
 
+RUN apt update && apt install --no-install-recommends libvips ca-certificates -y && rm -rf /var/lib/apt/lists/* &&  rm -rf /var/cache/apt/archives/*
+
 COPY --from=builder /build/webp-server  /usr/bin/webp-server
 COPY --from=builder /build/config.json /etc/config.json
 
-RUN apt update && apt install libaom-dev -y && rm -rf /var/lib/apt/lists/*
-
 WORKDIR /opt
 VOLUME /opt/exhaust
 CMD ["/usr/bin/webp-server", "--config", "/etc/config.json"]
diff --git a/README.md b/README.md
index af116ce..bd89edf 100644
--- a/README.md
+++ b/README.md
@@ -12,30 +12,40 @@
 
 This is a Server based on Golang, which allows you to serve WebP images on the fly. 
 It will convert `jpg,jpeg,png` files by default, this can be customized by editing the `config.json`.. 
-* currently supported  image format: JPEG, PNG, BMP, GIF(static image for now)
-
+* currently supported image format: JPEG, PNG, BMP, GIF(static image for now)
 
 > e.g When you visit `https://your.website/pics/tsuki.jpg`，it will serve as `image/webp` format without changing the URL.
 >
-> ~~For Safari and Opera users, the original image will be used.~~ 
-> We've now support Safari/Chrome/Firefox on iOS 14/iPadOS 14
-
+> ~~For Safari and Opera users, the original image will be used.~~
+> We've now supported Safari/Chrome/Firefox on iOS 14/iPadOS 14
 
 ## Simple Usage Steps(with Binary)
 
+> Note: There is a potential memory leak problem with this server and remains unsolved, we recommend using Docker to mitigate this problem.
+> Related discussion: https://github.com/webp-sh/webp_server_go/issues/75
+
 ### 1. Prepare the environment
 
-If you'd like to run binary directly on your machine, you need to install `libaom`:
+#### If you are using version after 0.6.0
 
-`libaom` is for AVIF support, you can install it by `apt install libaom-dev` on Ubuntu, `yum install libaom-devel` on CentOS.
+> Install `libvips` on your machine, more info [here](https://github.com/davidbyttow/govips)
+>
+> * Ubuntu `apt install libvips-dev`
+> * macOS `brew install vips pkg-config`
 
-Without this library, you may encounter error like this: `libaom.so.3: cannot open shared object file: No such file or directory`
+#### If you are using version before 0.6.0
 
-If you are using Intel Mac, you can install it by `brew install aom`
-
-If you are using Apple Silicon, you need to `brew install aom && export CPATH=/opt/homebrew/opt/aom/include/;LIBRARY_PATH=/opt/homebrew/opt/aom/lib/`, more references can be found at [在M1 Mac下开发WebP Server Go | 土豆不好吃](https://dmesg.app/m1-aom.html).
-
-If you don't like to hassle around with your system, so do us, why not have a try using Docker? >> [Docker | WebP Server Documentation](https://docs.webp.sh/usage/docker/)
+> If you'd like to run binary directly on your machine, you need to install `libaom`:
+>
+> `libaom` is for AVIF support, you can install it by `apt install libaom-dev` on Ubuntu, `yum install libaom-devel` on CentOS.
+>
+> Without this library, you may encounter error like this: `libaom.so.3: cannot open shared object file: No such file or directory`
+>
+> If you are using Intel Mac, you can install it by `brew install aom`
+>
+> If you are using Apple Silicon, you need to `brew install aom && export CPATH=/opt/homebrew/opt/aom/include/;LIBRARY_PATH=/opt/homebrew/opt/aom/lib/`, more references can be found at [在M1 Mac下开发WebP Server Go | 土豆不好吃](https://dmesg.app/m1-aom.html).
+>
+> If you don't like to hassle around with your system, so do us, why not have a try using Docker? >> [Docker | WebP Server Documentation](https://docs.webp.sh/usage/docker/)
 
 ### 2. Download the binary
 
@@ -96,7 +106,7 @@ For supervisor, Docker sections or detailed Nginx configuration, please read our
 ## Support us
 
 If you find this project useful, please consider supporting
-us [becoming a sponsor](https://github.com/sponsors/webp-sh) or using Stripe
+us by [becoming a sponsor](https://github.com/sponsors/webp-sh) or Stripe
 
 | USD(Card, Apple Pay and Google Pay)              | SEK(Card, Apple Pay and Google Pay)              | CNY(Card, Apple Pay, Google Pay and Alipay)      |
 |--------------------------------------------------|--------------------------------------------------|--------------------------------------------------|
diff --git a/config.go b/config.go
index 02e5145..ae63a3d 100644
--- a/config.go
+++ b/config.go
@@ -1,14 +1,10 @@
-// webp_server_go - config
-// 2020-11-27 13:05
-// Benny <benny.think@gmail.com>
-
 package main
 
 type Config struct {
 	Host         string   `json:"HOST"`
 	Port         string   `json:"PORT"`
 	ImgPath      string   `json:"IMG_PATH"`
-	Quality      float32  `json:"QUALITY,string"`
+	Quality      int      `json:"QUALITY,string"`
 	AllowedTypes []string `json:"ALLOWED_TYPES"`
 	ExhaustPath  string   `json:"EXHAUST_PATH"`
 	EnableAVIF   bool     `json:"ENABLE_AVIF"`
@@ -22,8 +18,7 @@ var (
 	prefetch, proxyMode      bool
 	remoteRaw                = "remote-raw"
 	config                   Config
-	version                  = "0.5.1"
-	releaseURL               = "https://github.com/webp-sh/webp_server_go/releases/latest/download/"
+	version                  = "0.6.0"
 )
 
 const (
diff --git a/encoder.go b/encoder.go
index 19e4a42..ab3a130 100644
--- a/encoder.go
+++ b/encoder.go
@@ -1,23 +1,15 @@
 package main
 
 import (
-	"bytes"
 	"errors"
-	"fmt"
-	"image"
-	"image/jpeg"
-	"image/png"
 	"os"
 	"path"
 	"path/filepath"
-	"runtime"
 	"strings"
 	"sync"
 
-	"github.com/Kagami/go-avif"
-	"github.com/chai2010/webp"
+	"github.com/davidbyttow/govips/v2/vips"
 	log "github.com/sirupsen/logrus"
-	"golang.org/x/image/bmp"
 )
 
 func convertFilter(raw, avifPath, webpPath string, c chan int) {
@@ -73,12 +65,11 @@ func convertImage(raw, optimized, itype string) error {
 		}
 	}
 
-	//we need to create dir first
+	// we need to create dir first
 	err = os.MkdirAll(path.Dir(optimized), 0755)
 	if err != nil {
 		log.Error(err.Error())
 	}
-	//q, _ := strconv.ParseFloat(config.Quality, 32)
 
 	switch itype {
 	case "webp":
@@ -89,79 +80,75 @@ func convertImage(raw, optimized, itype string) error {
 	return err
 }
 
-func readRawImage(imgPath string, maxPixel int) (img image.Image, err error) {
-	data, err := os.ReadFile(imgPath)
-	if err != nil {
-		log.Errorln(err)
-	}
-
-	imgExtension := strings.ToLower(path.Ext(imgPath))
-	if strings.Contains(imgExtension, "jpeg") || strings.Contains(imgExtension, "jpg") {
-		img, err = jpeg.Decode(bytes.NewReader(data))
-	} else if strings.Contains(imgExtension, "png") {
-		img, err = png.Decode(bytes.NewReader(data))
-	} else if strings.Contains(imgExtension, "bmp") {
-		img, err = bmp.Decode(bytes.NewReader(data))
-	}
-	if err != nil || img == nil {
-		errinfo := fmt.Sprintf("image file %s is corrupted: %v", imgPath, err)
-		log.Errorln(errinfo)
-		return nil, errors.New(errinfo)
-	}
-
-	x, y := img.Bounds().Max.X, img.Bounds().Max.Y
-	if x > maxPixel || y > maxPixel {
-		errinfo := fmt.Sprintf("Read image error: %s(%dx%d) is too large", imgPath, x, y)
-		log.Warnf(errinfo)
-		return nil, errors.New(errinfo)
-	}
-
-	return img, nil
-}
-
-func avifEncoder(p1, p2 string, quality float32) error {
-	var img image.Image
-	dst, err := os.Create(p2)
-	if err != nil {
-		log.Fatalf("Can't create destination file: %v", err)
-	}
-	// AVIF has a maximum resolution of 65536 x 65536 pixels.
-	img, err = readRawImage(p1, avifMax)
+func avifEncoder(p1, p2 string, quality int) error {
+	// if convert fails, return error; success nil
+	var buf []byte
+	img, err := vips.NewImageFromFile(p1)
 	if err != nil {
 		return err
 	}
-
-	err = avif.Encode(dst, img, &avif.Options{
-		Threads:        runtime.NumCPU(),
-		Speed:          avif.MaxSpeed,
-		Quality:        int((100 - quality) / 100 * avif.MaxQuality),
-		SubsampleRatio: nil,
-	})
+	// AVIF has a maximum resolution of 65536 x 65536 pixels.
+	if img.Metadata().Width > avifMax || img.Metadata().Height > avifMax {
+		return errors.New("WebP: image too large")
+	}
+	// If quality >= 100, we use lossless mode
+	if quality >= 100 {
+		buf, _, err = img.ExportAvif(&vips.AvifExportParams{
+			Lossless:      true,
+			StripMetadata: true,
+		})
+	} else {
+		buf, _, err = img.ExportAvif(&vips.AvifExportParams{
+			Quality:       quality,
+			Lossless:      false,
+			StripMetadata: true,
+		})
+	}
 
 	if err != nil {
 		log.Warnf("Can't encode source image: %v to AVIF", err)
 	}
 
+	if err := os.WriteFile(p2, buf, 0600); err != nil {
+		log.Error(err)
+		return err
+	}
+
 	convertLog("AVIF", p1, p2, quality)
 	return nil
 }
 
-func webpEncoder(p1, p2 string, quality float32) error {
+func webpEncoder(p1, p2 string, quality int) error {
 	// if convert fails, return error; success nil
-	var buf bytes.Buffer
-	var img image.Image
-	// The maximum pixel dimensions of a WebP image is 16383 x 16383.
-	img, err := readRawImage(p1, webpMax)
+	var buf []byte
+	img, err := vips.NewImageFromFile(p1)
 	if err != nil {
 		return err
 	}
 
-	err = webp.Encode(&buf, img, &webp.Options{Lossless: false, Quality: quality})
+	// The maximum pixel dimensions of a WebP image is 16383 x 16383.
+	if img.Metadata().Width > webpMax || img.Metadata().Height > webpMax {
+		return errors.New("WebP: image too large")
+	}
+	// If quality >= 100, we use lossless mode
+	if quality >= 100 {
+		buf, _, err = img.ExportWebp(&vips.WebpExportParams{
+			Lossless:      true,
+			StripMetadata: true,
+		})
+	} else {
+		buf, _, err = img.ExportWebp(&vips.WebpExportParams{
+			Quality:       quality,
+			Lossless:      false,
+			StripMetadata: true,
+		})
+	}
+
 	if err != nil {
 		log.Warnf("Can't encode source image: %v to WebP", err)
 	}
 
-	if err := os.WriteFile(p2, buf.Bytes(), 0600); err != nil {
+	if err := os.WriteFile(p2, buf, 0600); err != nil {
 		log.Error(err)
 		return err
 	}
@@ -170,9 +157,9 @@ func webpEncoder(p1, p2 string, quality float32) error {
 	return nil
 }
 
-func convertLog(itype, p1 string, p2 string, quality float32) {
+func convertLog(itype, p1 string, p2 string, quality int) {
 	oldf, _ := os.Stat(p1)
 	newf, _ := os.Stat(p2)
-	log.Infof("%s@%.2f%%: %s->%s %d->%d %.2f%% deflated", itype, quality,
+	log.Infof("%s@%d%%: %s->%s %d->%d %.2f%% deflated", itype, quality,
 		p1, p2, oldf.Size(), newf.Size(), float32(newf.Size())/float32(oldf.Size())*100)
 }
diff --git a/encoder_test.go b/encoder_test.go
index 93e4981..cca8744 100644
--- a/encoder_test.go
+++ b/encoder_test.go
@@ -10,6 +10,8 @@ import (
 	"testing"
 )
 
+var dest = "/tmp/test-result"
+
 func walker() []string {
 	var list []string
 	_ = filepath.Walk("./pics", func(p string, info os.FileInfo, err error) error {
@@ -23,7 +25,6 @@ func walker() []string {
 
 func TestWebPEncoder(t *testing.T) {
 	// Go through every files
-	var dest = "/tmp/test-result"
 	var target = walker()
 	for _, f := range target {
 		runEncoder(t, f, dest)
@@ -33,28 +34,25 @@ func TestWebPEncoder(t *testing.T) {
 
 func TestAvifEncoder(t *testing.T) {
 	// Only one file: img_over_16383px.jpg might cause memory issues on CI environment
-	var dest = "/tmp/test-result"
-	avifEncoder("./pics/big.jpg", dest, 80)
+	assert.Nil(t, avifEncoder("./pics/big.jpg", dest, 80))
 	assertType(t, dest, "image/avif")
 }
 
 func TestNonExistImage(t *testing.T) {
-	var dest = "/tmp/test-result"
-	webpEncoder("./pics/empty.jpg", dest, 80)
-	avifEncoder("./pics/empty.jpg", dest, 80)
+	assert.NotNil(t, webpEncoder("./pics/empty.jpg", dest, 80))
+	assert.NotNil(t, avifEncoder("./pics/empty.jpg", dest, 80))
 }
 
-func TestConvertFail(t *testing.T) {
-	var dest = "/tmp/test-result"
-	webpEncoder("./pics/webp_server.jpg", dest, -1)
-	avifEncoder("./pics/webp_server.jpg", dest, -1)
+func TestHighResolutionImage(t *testing.T) {
+	assert.NotNil(t, webpEncoder("./pics/img_over_16383px.jpg", dest, 80))
+	assert.Nil(t, avifEncoder("./pics/img_over_16383px.jpg", dest, 80))
 }
 
 func runEncoder(t *testing.T, file string, dest string) {
 	if file == "pics/empty.jpg" {
 		t.Log("Empty file, that's okay.")
 	}
-	webpEncoder(file, dest, 80)
+	_ = webpEncoder(file, dest, 80)
 	assertType(t, dest, "image/webp")
 
 }
diff --git a/go.mod b/go.mod
index 7d5a805..aad052e 100644
--- a/go.mod
+++ b/go.mod
@@ -3,16 +3,13 @@ module webp_server_go
 go 1.20
 
 require (
-	github.com/Kagami/go-avif v0.1.0
-	github.com/chai2010/webp v1.1.0
+	github.com/davidbyttow/govips/v2 v2.13.0
 	github.com/gofiber/fiber/v2 v2.4.0
 	github.com/h2non/filetype v1.1.3
 	github.com/schollz/progressbar/v3 v3.13.1
 	github.com/sirupsen/logrus v1.9.0
-	github.com/staktrace/go-update v0.0.0-20210525161054-fc019945f9a2
 	github.com/stretchr/testify v1.8.2
 	github.com/valyala/fasthttp v1.47.0
-	golang.org/x/image v0.7.0
 )
 
 require (
@@ -25,12 +22,12 @@ require (
 	github.com/rivo/uniseg v0.4.3 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/tcplisten v1.0.0 // indirect
-	golang.org/x/sys v0.6.0 // indirect
-	golang.org/x/term v0.6.0 // indirect
+	golang.org/x/image v0.7.0 // indirect
+	golang.org/x/net v0.8.0 // indirect
+	golang.org/x/sys v0.7.0 // indirect
+	golang.org/x/term v0.7.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 
-replace (
-	github.com/chai2010/webp v1.1.0 => github.com/webp-sh/webp v1.2.0
-	github.com/gofiber/fiber/v2 v2.4.0 => github.com/webp-sh/fiber/v2 v2.4.0
-)
+replace github.com/gofiber/fiber/v2 v2.4.0 => github.com/webp-sh/fiber/v2 v2.4.0
diff --git a/go.sum b/go.sum
index 4e1ad74..1790473 100644
--- a/go.sum
+++ b/go.sum
@@ -1,22 +1,27 @@
-github.com/Kagami/go-avif v0.1.0 h1:8GHAGLxCdFfhpd4Zg8j1EqO7rtcQNenxIDerC/uu68w=
-github.com/Kagami/go-avif v0.1.0/go.mod h1:OPmPqzNdQq3+sXm0HqaUJQ9W/4k+Elbc3RSfJUemDKA=
 github.com/andybalholm/brotli v1.0.0/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
 github.com/andybalholm/brotli v1.0.5 h1:8uQZIdzKmjc/iuPu7O2ioW48L81FgatrcpfFmiq/cCs=
 github.com/andybalholm/brotli v1.0.5/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davidbyttow/govips/v2 v2.13.0 h1:5MK9ZcXZC5GzUR9Ca8fJwOYqMgll/H096ec0PJP59QM=
+github.com/davidbyttow/govips/v2 v2.13.0/go.mod h1:LPTrwWtNa5n4yl9UC52YBOEGdZcY5hDTP4Ms2QWasTw=
 github.com/h2non/filetype v1.1.3 h1:FKkx9QbD7HR/zjK1Ia5XiBsq9zdLi5Kf3zGyFTAFkGg=
 github.com/h2non/filetype v1.1.3/go.mod h1:319b3zT68BvV+WRj7cwy856M2ehB3HqNOt6sy1HndBY=
 github.com/k0kubun/go-ansi v0.0.0-20180517002512-3bf9e2903213/go.mod h1:vNUNkEQ1e29fT/6vq2aBdFsgNPmy8qMdSay1npru+Sw=
 github.com/klauspost/compress v1.10.7/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
 github.com/klauspost/compress v1.16.3 h1:XuJt9zzcnaz6a16/OU53ZjWp/v7/42WcR5t2a0PcNQY=
 github.com/klauspost/compress v1.16.3/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/mattn/go-isatty v0.0.17/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-runewidth v0.0.14 h1:+xnbZSEeDbOIg5/mE6JF0w6n9duR1l3/WmbinWVwUuU=
 github.com/mattn/go-runewidth v0.0.14/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db h1:62I3jR2EmQ4l5rM/4FEfDWcRD+abF5XlKShorW5LRoQ=
 github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db/go.mod h1:l0dey0ia/Uv7NcFFVbCLtqEBQbrT4OCwCSKTEv6enCw=
+github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
+github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
@@ -26,12 +31,11 @@ github.com/schollz/progressbar/v3 v3.13.1 h1:o8rySDYiQ59Mwzy2FELeHY5ZARXZTVJC7iH
 github.com/schollz/progressbar/v3 v3.13.1/go.mod h1:xvrbki8kfT1fzWzBT/UZd9L6GA+jdL7HAgq2RFnO6fQ=
 github.com/sirupsen/logrus v1.9.0 h1:trlNQbNUG3OdDrDil03MCb1H2o9nJ1x4/5LYw7byDE0=
 github.com/sirupsen/logrus v1.9.0/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
-github.com/staktrace/go-update v0.0.0-20210525161054-fc019945f9a2 h1:kyTDvRL8TyTHOx0aK1PKMPVfkI7rCLDC1nrKF7SYOBc=
-github.com/staktrace/go-update v0.0.0-20210525161054-fc019945f9a2/go.mod h1:yzHsbjWRHVF1vVGsluwqCc2TvogFSx9C8TeBh34cMb0=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
@@ -47,12 +51,11 @@ github.com/valyala/tcplisten v1.0.0 h1:rBHj/Xf+E1tRGZyWIWwJDiRY0zc1Js+CV5DqwacVS
 github.com/valyala/tcplisten v1.0.0/go.mod h1:T0xQ8SeCZGxckz9qRXTfG43PvQ/mcWh7FwZEA7Ioqkc=
 github.com/webp-sh/fiber/v2 v2.4.0 h1:JtkW0HAqHCExodZMZnG7GrLiJuK2YbNYw8eXo55+tr8=
 github.com/webp-sh/fiber/v2 v2.4.0/go.mod h1:f8BRRIMjMdRyt2qmJ/0Sea3j3rwwfufPrh9WNBRiVZ0=
-github.com/webp-sh/webp v1.2.0 h1:WiAR1M4Cz50Ehv0vP8VaBZwuTqBgLxcGMaBV23zLVDA=
-github.com/webp-sh/webp v1.2.0/go.mod h1:DWmBXPtpA/zfTgEgWxAlsER3B7nXFvDtCi1YY+K5N9w=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/image v0.5.0/go.mod h1:FVC7BI/5Ym8R25iw5OLsgshdUBbT1h5jZTpA+mvAdZ4=
 golang.org/x/image v0.7.0 h1:gzS29xtG1J5ybQlv0PuyfE3nmc6R4qB73m6LUUmvFuw=
 golang.org/x/image v0.7.0/go.mod h1:nd/q4ef1AKKYl/4kft7g+6UyGbdiqWqTP1ZAbRoV7Rg=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
@@ -63,6 +66,9 @@ golang.org/x/net v0.0.0-20201016165138-7b1cca2348c0/go.mod h1:sp8m0HH+o8qH0wwXwY
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
+golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -77,25 +83,29 @@ golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.7.0 h1:3jlCCIQZPdOYu1h8BkNvLz8Kgwtae2cagcG/VamtZRU=
+golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/term v0.6.0 h1:clScbb1cHjoCkyRbWwBEUZ5H/tIFu5TAXIqaZD0Gcjw=
 golang.org/x/term v0.6.0/go.mod h1:m6U89DPEgQRMq3DNkDClhWw02AUbt2daBVO4cn4Hv9U=
+golang.org/x/term v0.7.0 h1:BEvjmm5fURWqcfbSKTdpkDXYBrUS1c0m8agp14W48vQ=
+golang.org/x/term v0.7.0/go.mod h1:P32HKFT3hSsZrRxla30E9HqToFYAQPCMs/zFMBUFqPY=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
 golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 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 v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b h1:QRR6H1YWRnHb4Y/HeNFCTJLFVxaq6wH4YuVdsUOr75U=
+gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/helper.go b/helper.go
index ba7ac28..8cb6b4e 100644
--- a/helper.go
+++ b/helper.go
@@ -21,14 +21,14 @@ import (
 )
 
 func avifMatcher(buf []byte) bool {
-	// 0000001C 66747970 6D696631 00000000 6D696631 61766966 6D696166 000000F4
+	// 0000001c 66747970 61766966 00000000 61766966 6d696631 6d696166
 	return len(buf) > 1 && bytes.Equal(buf[:28], []byte{
 		0x0, 0x0, 0x0, 0x1c,
 		0x66, 0x74, 0x79, 0x70,
-		0x6d, 0x69, 0x66, 0x31,
-		0x0, 0x0, 0x0, 0x0,
-		0x6d, 0x69, 0x66, 0x31,
 		0x61, 0x76, 0x69, 0x66,
+		0x0, 0x0, 0x0, 0x0,
+		0x61, 0x76, 0x69, 0x66,
+		0x6d, 0x69, 0x66, 0x31,
 		0x6d, 0x69, 0x61, 0x66,
 	})
 }
diff --git a/pics/invalid.png b/pics/invalid.png
new file mode 100644
index 0000000..c6635d3
Binary files /dev/null and b/pics/invalid.png differ
diff --git a/prefetch_test.go b/prefetch_test.go
index 7788d4d..ec8ea80 100644
--- a/prefetch_test.go
+++ b/prefetch_test.go
@@ -1,13 +1,10 @@
-// webp_server_go - prefetch_test.go
-// 2020-11-10 09:27
-// Benny <benny.think@gmail.com>
-
 package main
 
 import (
-	"github.com/stretchr/testify/assert"
 	"os"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestPrefetchImages(t *testing.T) {
diff --git a/router_test.go b/router_test.go
index c8829f9..4f70151 100644
--- a/router_test.go
+++ b/router_test.go
@@ -1,7 +1,3 @@
-// webp_server_go - webp-server_test
-// 2020-11-09 11:55
-// Benny <benny.think@gmail.com>
-
 package main
 
 import (
@@ -76,7 +72,7 @@ func TestConvert(t *testing.T) {
 		"http://127.0.0.1:3333/webp_server.bmp":                 "image/webp",
 		"http://127.0.0.1:3333/webp_server.png":                 "image/webp",
 		"http://127.0.0.1:3333/empty.jpg":                       "",
-		"http://127.0.0.1:3333/png.jpg":                         "image/png",
+		"http://127.0.0.1:3333/png.jpg":                         "image/webp",
 		"http://127.0.0.1:3333/12314.jpg":                       "",
 		"http://127.0.0.1:3333/dir1/inside.jpg":                 "image/webp",
 		"http://127.0.0.1:3333/%e5%a4%aa%e7%a5%9e%e5%95%a6.png": "image/webp",
diff --git a/update.go b/update.go
deleted file mode 100644
index 4226a16..0000000
--- a/update.go
+++ /dev/null
@@ -1,63 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-
-	log "github.com/sirupsen/logrus"
-	"github.com/staktrace/go-update"
-
-	"io"
-	"net/http"
-	"runtime"
-)
-
-func autoUpdate() {
-	defer func() {
-		if err := recover(); err != nil {
-			log.Errorf("Download error: %s", err)
-		}
-	}()
-
-	var api = "https://api.github.com/repos/webp-sh/webp_server_go/releases/latest"
-	type Result struct {
-		TagName string `json:"tag_name"`
-	}
-	var res Result
-	log.Debugf("Requesting to %s", api)
-	resp1, err := http.Get(api)
-	if err != nil {
-		log.Errorf("Error requesting to %s", api)
-	}
-	defer resp1.Body.Close()
-	data1, _ := io.ReadAll(resp1.Body)
-	_ = json.Unmarshal(data1, &res)
-	var gitVersion = res.TagName
-
-	if gitVersion > version {
-		log.Infof("Time to update! New version %s found", gitVersion)
-	} else {
-		log.Debug("No new version found.")
-		return
-	}
-
-	var filename = fmt.Sprintf("webp-server-%s-%s", runtime.GOOS, runtime.GOARCH)
-	if runtime.GOOS == "windows" {
-		filename += ".exe"
-	}
-	log.Info("Downloading binary to update...")
-	resp, _ := http.Get(releaseURL + filename)
-	if resp.StatusCode != 200 {
-		log.Debugf("%s-%s not found on release.", runtime.GOOS, runtime.GOARCH)
-		return
-	}
-
-	err = update.Apply(resp.Body, update.Options{})
-	if err != nil {
-		// error handling
-		log.Errorf("Update error. %v", err)
-	} else {
-		log.Info("Update complete. Please restart to apply changes.")
-	}
-	_ = resp.Body.Close()
-}
diff --git a/update_test.go b/update_test.go
deleted file mode 100644
index 2f82eb7..0000000
--- a/update_test.go
+++ /dev/null
@@ -1,37 +0,0 @@
-// webp_server_go - update_test
-// 2020-11-10 09:36
-// Benny <benny.think@gmail.com>
-
-package main
-
-import (
-	"os"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestNormalAutoUpdate(t *testing.T) {
-	version = "0.0.1"
-	dir := "./update"
-	autoUpdate()
-	assert.NotEqual(t, 0, fileCount(dir))
-	_ = os.RemoveAll(dir)
-}
-
-func Test404AutoUpdate(t *testing.T) {
-	version = "0.0.1"
-	dir := "./update"
-	releaseURL = releaseURL + "a"
-	autoUpdate()
-	assert.Equal(t, int64(0), fileCount(dir))
-	_ = os.RemoveAll(dir)
-}
-
-func TestNoNeedAutoUpdate(t *testing.T) {
-	version = "99.99"
-	dir := "./update"
-	autoUpdate()
-	info, _ := os.Stat(dir)
-	assert.Nil(t, info)
-}
diff --git a/webp-server.go b/webp-server.go
index 5b41809..d42aa51 100644
--- a/webp-server.go
+++ b/webp-server.go
@@ -8,6 +8,7 @@ import (
 	"regexp"
 	"runtime"
 
+	"github.com/davidbyttow/govips/v2/vips"
 	"github.com/gofiber/fiber/v2"
 	"github.com/gofiber/fiber/v2/middleware/logger"
 	log "github.com/sirupsen/logrus"
@@ -94,10 +95,14 @@ Develop by WebP Server team. https://github.com/webp-sh`, version)
 		os.Exit(0)
 	}
 
-	// go autoUpdate()
 	config = loadConfig(configPath)
 	switchProxyMode()
 
+	vips.Startup(&vips.Config{
+		ConcurrencyLevel: runtime.NumCPU(),
+	})
+	defer vips.Shutdown()
+
 	if prefetch {
 		go prefetchImages(config.ImgPath, config.ExhaustPath)
 	}
diff --git a/webp-server_test.go b/webp-server_test.go
index 6fb7bdc..4b4ef27 100644
--- a/webp-server_test.go
+++ b/webp-server_test.go
@@ -1,17 +1,14 @@
-// webp_server_go - webp-server_test
-// 2020-11-10 09:41
-// Benny <benny.think@gmail.com>
-
 package main
 
 import (
-	log "github.com/sirupsen/logrus"
-	"github.com/stretchr/testify/assert"
 	"net"
 	"os"
 	"runtime"
 	"testing"
 	"time"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
 )
 
 // due to test limit, we can't test for cli param part.
@@ -21,7 +18,7 @@ func TestLoadConfig(t *testing.T) {
 	assert.Equal(t, "./exhaust", c.ExhaustPath)
 	assert.Equal(t, "127.0.0.1", c.Host)
 	assert.Equal(t, "3333", c.Port)
-	assert.Equal(t, float32(80), c.Quality)
+	assert.Equal(t, 80, c.Quality)
 	assert.Equal(t, "./pics", c.ImgPath)
 	assert.Equal(t, []string{"jpg", "png", "jpeg", "bmp"}, c.AllowedTypes)
 }