diff --git a/.github/workflows/reviewdog.yml b/.github/workflows/reviewdog.yml
new file mode 100644
index 0000000..ee8cfe7
--- /dev/null
+++ b/.github/workflows/reviewdog.yml
@@ -0,0 +1,13 @@
+name: reviewdog
+on: [pull_request]
+jobs:
+  staticcheck:
+    name: staticcheck
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: reviewdog/action-staticcheck@v1
+        with:
+          github_token: ${{ secrets.github_token }}
+          reporter: github-pr-review
+          fail_on_error: true
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
new file mode 100644
index 0000000..020f3b6
--- /dev/null
+++ b/.github/workflows/test.yaml
@@ -0,0 +1,32 @@
+name: test
+on:
+  push:
+    branches:
+    - "**"
+  pull_request: {}
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+        - ubuntu-latest
+        - macOS-latest
+        - windows-latest
+    steps:
+    - name: setup go
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.x
+    - name: Set git to use LF
+      run: |
+        git config --global core.autocrlf false
+        git config --global core.eol lf
+      if: "matrix.os == 'windows-latest'"
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: test
+      run: go test -race -coverprofile coverage.out -covermode atomic ./...
+    - name: Send coverage
+      uses: codecov/codecov-action@v1
diff --git a/.gitignore b/.gitignore
index 8ee0658..e7ddb6d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 .*
 !.gitignore
-!.travis.yml
-!.goxc.json
+!.github
 dist/
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 3629ac4..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-language: go
-go:
-- tip
-script:
-- make lint
-- make test
-after_script:
-- make cover
diff --git a/Makefile b/Makefile
index fff23c6..ed1cb7a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,16 +1,18 @@
-test: deps
-	go test
+u := $(if $(update),-u)
 
+.PHONY: deps
 deps:
-	go get -d -v -t ./...
-	go get golang.org/x/lint/golint
-	go get github.com/mattn/goveralls
+	go get ${u} -d
+	go mod tidy
 
-lint: deps
-	go vet
-	golint -set_exit_status
+.PHONY: devel-deps
+devel-deps:
+	go install github.com/Songmu/godzil/cmd/godzil@latest
 
-cover: deps
-	goveralls
+.PHONY: test
+test:
+	go test
 
-.PHONY: test deps lint cover
+.PHONY: release
+release: devel-deps
+	godzil release
diff --git a/README.md b/README.md
index 178d008..488ad41 100644
--- a/README.md
+++ b/README.md
@@ -1,15 +1,52 @@
 go-ltsv
 =======
 
-[![Build Status](https://travis-ci.org/Songmu/go-ltsv.png?branch=master)][travis]
-[![Coverage Status](https://coveralls.io/repos/Songmu/go-ltsv/badge.png?branch=master)][coveralls]
-[![MIT License](http://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)][license]
-[![GoDoc](https://godoc.org/github.com/Songmu/go-ltsv?status.svg)][godoc]
-
-[travis]: https://travis-ci.org/Songmu/go-ltsv
-[coveralls]: https://coveralls.io/r/Songmu/go-ltsv?branch=master
-[license]: https://github.com/Songmu/go-ltsv/blob/master/LICENSE
-[godoc]: https://godoc.org/github.com/Songmu/go-ltsv
+[![Test Status](https://github.com/Songmu/go-ltsv/workflows/test/badge.svg?branch=main)][actions]
+[![Coverage Status](https://codecov.io/gh/Songmu/go-ltsv/branch/main/graph/badge.svg)][codecov]
+[![MIT License](https://img.shields.io/github/license/Songmu/go-ltsv)][license]
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/Songmu/go-ltsv)][PkgGoDev]
+
+[actions]: https://github.com/Songmu/go-ltsv/actions?workflow=test
+[codecov]: https://codecov.io/gh/Songmu/go-ltsv
+[license]: https://github.com/Songmu/go-ltsv/blob/main/LICENSE
+[PkgGoDev]: https://pkg.go.dev/github.com/Songmu/go-ltsv
+
+LTSV library to map ltsv to struct.
+
+## Synopsis
+
+```go
+import (
+	"net"
+
+	"github.com/Songmu/go-ltsv"
+)
+
+type log struct {
+	Host    net.IP
+	Req     string
+	Status  int
+	Size    int
+	UA      string
+	ReqTime float64
+	AppTime *float64
+	VHost   string
+}
+
+func main() {
+	ltsvLog := "time:2016-07-13T00:00:04+09:00\t" +
+		"host:192.0.2.1\t" +
+		"req:POST /api/v0/tsdb HTTP/1.1\t" +
+		"status:200\t" +
+		"size:36\t" +
+		"ua:ua:mackerel-agent/0.31.2 (Revision 775fad2)\t" +
+		"reqtime:0.087\t" +
+		"vhost:mackerel.io"
+	l := &log{}
+	ltsv.Unmarshal([]byte(ltsvLog), l)
+	...
+}
+```
 
 ## Description
 
@@ -17,7 +54,9 @@ LTSV parser and encoder for Go with reflection
 
 ## Installation
 
-    % go get github.com/Songmu/go-ltsv
+```console
+% go get github.com/Songmu/go-ltsv
+```
 
 ## Author
 
diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 0000000..69cb760
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1 @@
+comment: false
diff --git a/encode_test.go b/encode_test.go
index 4ea02de..d1cee30 100644
--- a/encode_test.go
+++ b/encode_test.go
@@ -48,7 +48,7 @@ var encodeTests = []struct {
 			EmailVerified: true,
 			Memo:          "songmu.jp",
 		},
-		Output: "user:songmu\tage:36\tweight:66.6",
+		Output: "user:songmu\tage:36\tweight:66.6\temail_verified:true",
 	},
 	{
 		Name: "Simple without nil pointer",
@@ -60,7 +60,7 @@ var encodeTests = []struct {
 			EmailVerified: false,
 			Memo:          "songmu.jp",
 		},
-		Output: "user:songmu\tage:36\theight:169.1\tweight:66.6",
+		Output: "user:songmu\tage:36\theight:169.1\tweight:66.6\temail_verified:false",
 	},
 	{
 		Name: "Omit memo",
@@ -69,7 +69,7 @@ var encodeTests = []struct {
 			Age:  36,
 			Memo: "songmu.jp",
 		},
-		Output: "user:songmu\tage:36\tweight:0",
+		Output: "user:songmu\tage:36\tweight:0\temail_verified:false",
 	},
 	{
 		Name: "Anthoer struct",
@@ -108,7 +108,7 @@ func TestMarshal(t *testing.T) {
 			}
 		} else {
 			if s != tt.Output {
-				t.Errorf("%s: out=%s, want=%s", tt.Name, s, tt.Output)
+				t.Errorf("%s:\n  out =%s\n  want=%s", tt.Name, s, tt.Output)
 			}
 		}
 	}
diff --git a/example_test.go b/example_test.go
index 1d8faba..6e5fd3a 100644
--- a/example_test.go
+++ b/example_test.go
@@ -1,7 +1,6 @@
 package ltsv_test
 
 import (
-	"fmt"
 	"net"
 	"time"
 
@@ -47,14 +46,10 @@ func ExampleUnmarshal() {
 		"vhost:mackerel.io"
 	l := log{}
 	ltsv.Unmarshal([]byte(ltsvLog), &l)
-	t := l.Time
-	l.Time = nil
-	fmt.Println(t)
 	pretty.Println(l)
 	// Output:
-	// 2016-07-13 00:00:04 +0900 +0900
 	// ltsv_test.log{
-	//     Time:    (*ltsv_test.logTime)(nil),
+	//     Time:    time.Date(2016, time.July, 13, 0, 0, 4, 0, time.Location("")),
 	//     Host:    {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xff, 0xff, 0xc0, 0x0, 0x2, 0x1},
 	//     Req:     "POST /api/v0/tsdb HTTP/1.1",
 	//     Status:  200,
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..2eda2b1
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,10 @@
+module github.com/Songmu/go-ltsv
+
+go 1.18
+
+require github.com/kr/pretty v0.3.0
+
+require (
+	github.com/kr/text v0.2.0 // indirect
+	github.com/rogpeppe/go-internal v1.6.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..801b302
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,12 @@
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
+github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/rogpeppe/go-internal v1.6.1 h1:/FiVV8dS/e+YqF2JvO3yXRFbBLTIuSDkuC7aBOAvL+k=
+github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=