diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 195a8a6..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,24 +0,0 @@
-language: go
-
-go:
-  - 1.6
-  - 1.7
-  - 1.8
-  - tip
-env:
-  - LIBWEBP_VERSION="0.5.0"
-  - LIBWEBP_VERSION="0.5.1"
-  - LIBWEBP_VERSION="1.1.0"
-
-
-cache:
-  directories:
-    - $HOME/cache
-sudo: false
-
-before_install:
-  - LIBWEBP_PREFIX=$HOME/cache/libwebp-${LIBWEBP_VERSION} make libwebp
-  - cd $HOME/gopath/src/github.com/harukasan/go-libwebp
-  - export CGO_CFLAGS="-I $HOME/cache/libwebp-${LIBWEBP_VERSION}/include"
-  - export CGO_LDFLAGS="-L $HOME/cache/libwebp-${LIBWEBP_VERSION}/lib"
-  - export LD_LIBRARY_PATH=$HOME/cache/libwebp-${LIBWEBP_VERSION}/lib:$LD_LIBRARY_PATH
diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index 3c14bd3..0000000
--- a/Dockerfile
+++ /dev/null
@@ -1,23 +0,0 @@
-FROM alpine:3.4
-
-RUN apk add --no-cache g++ make go
-
-RUN mkdir -p /tmp/go-libwebp
-COPY Makefile /tmp/go-libwebp/Makefile
-
-ENV LIBWEBP_PREFIX="/usr/local" \
-    LIBWEBP_VERSION="0.5.1"
-RUN cd /tmp/go-libwebp && make libwebp
-
-ENV GOPATH="/go" \
-    WORKDIR="/go/src/github.com/harukasan/go-libwebp" \
-    PATH="/go/bin:/usr/local/go/bin:$PATH" \
-    CGO_CFLAGS="-I /usr/local/include"  \
-    CGO_LDFLAGS="-L /usr/local/lib" \
-    LD_LIBRARY_PATH="/usr/local/lib:$LD_LIBRARY_PATH"
-
-RUN mkdir -p $WORKDIR
-VOLUME $WORKDIR
-WORKDIR $WORKDIR
-
-CMD ["make", "test"]
diff --git a/Makefile b/Makefile
index 3b895cb..13d08d5 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-repo = github.com/harukasan/go-libwebp
+repo = github.com/tidbyt/go-libwebp
 build_dir = /tmp
 cur_dir = $(shell pwd)
 libwebp_so = ${LIBWEBP_PREFIX}/lib/libwebp.so
diff --git a/README.md b/README.md
index e8ef8ef..0d7a4b4 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,7 @@
 go-libwebp
 ==========
 
-[![Build Status](https://travis-ci.org/harukasan/go-libwebp.svg?branch=master)](https://travis-ci.org/harukasan/go-libwebp)
-[![GoDoc](https://godoc.org/github.com/harukasan/go-libwebp/webp?status.svg)](https://godoc.org/github.com/harukasan/go-libwebp/webp)
+[![GoDoc](https://godoc.org/github.com/tidbyt/go-libwebp/webp?status.svg)](https://godoc.org/github.com/tidbyt/go-libwebp/webp)
 
 A implementation of Go binding for [libwebp](https://developers.google.com/speed/webp/docs/api).
 
@@ -20,8 +19,8 @@ The [examples](./examples) directory contains example codes and images.
 package main
 
 import (
-	"github.com/harukasan/go-libwebp/test/util"
-	"github.com/harukasan/go-libwebp/webp"
+	"github.com/tidbyt/go-libwebp/test/util"
+	"github.com/tidbyt/go-libwebp/webp"
 )
 
 func main() {
@@ -52,8 +51,8 @@ import (
 	"bufio"
 	"image"
 
-	"github.com/harukasan/go-libwebp/test/util"
-	"github.com/harukasan/go-libwebp/webp"
+	"github.com/tidbyt/go-libwebp/test/util"
+	"github.com/tidbyt/go-libwebp/webp"
 )
 
 func main() {
@@ -86,8 +85,8 @@ import (
 	"image"
 	"time"
 
-	"github.com/harukasan/go-libwebp/test/util"
-	"github.com/harukasan/go-libwebp/webp"
+	"github.com/tidbyt/go-libwebp/test/util"
+	"github.com/tidbyt/go-libwebp/webp"
 )
 
 func main() {
diff --git a/examples/decode/decode.go b/examples/decode/decode.go
index 3a46724..99e6f9d 100644
--- a/examples/decode/decode.go
+++ b/examples/decode/decode.go
@@ -2,8 +2,8 @@
 package main
 
 import (
-	"github.com/harukasan/go-libwebp/test/util"
-	"github.com/harukasan/go-libwebp/webp"
+	"github.com/tidbyt/go-libwebp/test/util"
+	"github.com/tidbyt/go-libwebp/webp"
 )
 
 func main() {
diff --git a/examples/encode/encode.go b/examples/encode/encode.go
index f1eb977..2a1b9c3 100644
--- a/examples/encode/encode.go
+++ b/examples/encode/encode.go
@@ -5,8 +5,8 @@ import (
 	"bufio"
 	"image"
 
-	"github.com/harukasan/go-libwebp/test/util"
-	"github.com/harukasan/go-libwebp/webp"
+	"github.com/tidbyt/go-libwebp/test/util"
+	"github.com/tidbyt/go-libwebp/webp"
 )
 
 func main() {
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..8de3963
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/tidbyt/go-libwebp
+
+go 1.16
diff --git a/test/util/util.go b/test/util/util.go
index c284b75..b204f0c 100644
--- a/test/util/util.go
+++ b/test/util/util.go
@@ -10,29 +10,24 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
-	"strings"
 )
 
 // GetExFilePath returns the path of specified example file.
 func GetExFilePath(name string) string {
-	for _, gopath := range strings.Split(os.Getenv("GOPATH"), ":") {
-		path := filepath.Join(gopath, "src/github.com/harukasan/go-libwebp/examples/images", name)
-		if _, err := os.Stat(path); err == nil {
-			return path
-		}
+	path := filepath.Join("../examples/images", name)
+	if _, err := os.Stat(path); err == nil {
+		return path
 	}
-	panic(fmt.Errorf("%v does not exist in any directory which contains in $GOPATH", name))
+	panic(fmt.Errorf("%v does not exist", path))
 }
 
 // GetOutFilePath returns the path of specified out file.
 func GetOutFilePath(name string) string {
-	for _, gopath := range strings.Split(os.Getenv("GOPATH"), ":") {
-		path := filepath.Join(gopath, "src/github.com/harukasan/go-libwebp/examples/out")
-		if _, err := os.Stat(path); err == nil {
-			return filepath.Join(path, name)
-		}
+	path := "../examples/out"
+	if _, err := os.Stat(path); err == nil {
+		return filepath.Join(path, name)
 	}
-	panic(fmt.Errorf("out directory does not exist in any directory which contains in $GOPATH"))
+	panic(fmt.Errorf("out directory does not exist"))
 }
 
 // OpenFile opens specified example file
diff --git a/test/util/util_test.go b/test/util/util_test.go
deleted file mode 100644
index 810f40a..0000000
--- a/test/util/util_test.go
+++ /dev/null
@@ -1,54 +0,0 @@
-package util_test
-
-import (
-	"testing"
-
-	"github.com/harukasan/go-libwebp/test/util"
-)
-
-var PNGFiles = []string{
-	"butterfly.png",
-	"cosmos.png",
-	"fizyplankton.png",
-	"kinkaku.png",
-	"yellow-rose-3.png",
-}
-
-var WebPFiles = []string{
-	"butterfly.webp",
-	"cosmos.webp",
-	"fizyplankton.webp",
-	"kinkaku.webp",
-	"yellow-rose-3.webp",
-}
-
-func TestOpenFile(t *testing.T) {
-	for _, file := range PNGFiles {
-		util.OpenFile(file)
-	}
-	for _, file := range WebPFiles {
-		util.OpenFile(file)
-	}
-}
-
-func TestReadFile(t *testing.T) {
-	for _, file := range PNGFiles {
-		util.ReadFile(file)
-	}
-	for _, file := range WebPFiles {
-		util.ReadFile(file)
-	}
-}
-
-func TestCreateFile(t *testing.T) {
-	f := util.CreateFile("util_test")
-	f.Write([]byte{'o', 'k'})
-	f.Close()
-}
-
-func TestReadWritePNG(t *testing.T) {
-	for _, file := range PNGFiles {
-		png := util.ReadPNG(file)
-		util.WritePNG(png, "util_test_"+file)
-	}
-}
diff --git a/webp/anim_decode_test.go b/webp/anim_decode_test.go
index 5b68103..623364d 100644
--- a/webp/anim_decode_test.go
+++ b/webp/anim_decode_test.go
@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/harukasan/go-libwebp/test/util"
-	"github.com/harukasan/go-libwebp/webp"
+	"github.com/tidbyt/go-libwebp/test/util"
+	"github.com/tidbyt/go-libwebp/webp"
 )
 
 func TestDecodeAnimationInfo(t *testing.T) {
diff --git a/webp/anim_encode_test.go b/webp/anim_encode_test.go
index 0c1175d..b1e7e17 100644
--- a/webp/anim_encode_test.go
+++ b/webp/anim_encode_test.go
@@ -5,8 +5,8 @@ import (
 	"testing"
 	"time"
 
-	"github.com/harukasan/go-libwebp/test/util"
-	"github.com/harukasan/go-libwebp/webp"
+	"github.com/tidbyt/go-libwebp/test/util"
+	"github.com/tidbyt/go-libwebp/webp"
 )
 
 func TestEncodeAnimation(t *testing.T) {
diff --git a/webp/webp_test.go b/webp/webp_test.go
index 4a7ef30..1e26250 100644
--- a/webp/webp_test.go
+++ b/webp/webp_test.go
@@ -8,8 +8,8 @@ import (
 	"os"
 	"testing"
 
-	"github.com/harukasan/go-libwebp/test/util"
-	"github.com/harukasan/go-libwebp/webp"
+	"github.com/tidbyt/go-libwebp/test/util"
+	"github.com/tidbyt/go-libwebp/webp"
 )
 
 func TestMain(m *testing.M) {