diff --git a/.gitignore b/.gitignore
index 9fc24b7..daa3045 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 .vscode
 config.toml
 log/*
+go.sum
diff --git a/app/config.go b/app/config.go
index cd58e52..69c68ac 100644
--- a/app/config.go
+++ b/app/config.go
@@ -1,10 +1,11 @@
 package app
 
 import (
-	"github.com/theherk/viper"
 	"log"
 	"path/filepath"
 	"strings"
+
+	"github.com/spf13/viper"
 )
 
 // Initialize config.toml config. Fatal if not exist.
diff --git a/app/temp.go b/app/temp.go
index 0574f00..53f3489 100644
--- a/app/temp.go
+++ b/app/temp.go
@@ -1,13 +1,14 @@
 package app
 
 import (
-	"xiamiToLastfm/xiami"
-	"os"
-	"encoding/json"
-	"log"
-	"fmt"
 	"bufio"
+	"encoding/json"
 	"errors"
+	"fmt"
+	"log"
+	"os"
+
+	"xiamiToLastfm/xiami"
 )
 
 var file = "temp.txt"
diff --git a/app/temp_test.go b/app/temp_test.go
index 6e9373f..2ab9082 100644
--- a/app/temp_test.go
+++ b/app/temp_test.go
@@ -2,8 +2,9 @@ package app
 
 import (
 	"testing"
-	"xiamiToLastfm/xiami"
+
 	"github.com/stretchr/testify/assert"
+	"xiamiToLastfm/xiami"
 )
 
 func TestTempStore(t *testing.T) {
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..bfebbe8
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,9 @@
+module xiamiToLastfm
+
+go 1.14
+
+require (
+	github.com/PuerkitoBio/goquery v1.6.0
+	github.com/spf13/viper v1.7.1
+	github.com/stretchr/testify v1.6.1
+)
diff --git a/lastfm/auth.go b/lastfm/auth.go
index 4eb2eb6..551fa98 100644
--- a/lastfm/auth.go
+++ b/lastfm/auth.go
@@ -13,7 +13,7 @@ import (
 	"sort"
 	"time"
 
-	"github.com/theherk/viper"
+	"github.com/spf13/viper"
 )
 
 var (
diff --git a/lastfm/lastfm.go b/lastfm/lastfm.go
index 37e33ed..666a15a 100644
--- a/lastfm/lastfm.go
+++ b/lastfm/lastfm.go
@@ -9,8 +9,9 @@ import (
 	"net/http"
 	"net/url"
 	"os"
-	"xiamiToLastfm/xiami"
+
 	"xiamiToLastfm/musicbrainz"
+	"xiamiToLastfm/xiami"
 )
 
 // QuitChan: an empty channel used to signal main channel to stop.
diff --git a/main.go b/main.go
index 7008b4b..132e91c 100644
--- a/main.go
+++ b/main.go
@@ -1,18 +1,18 @@
 package main
 
 import (
+	"flag"
 	"fmt"
+	"log"
 	"os"
 	"os/signal"
 	"syscall"
 	"time"
-	"log"
-	"flag"
 
+	"github.com/spf13/viper"
 	"xiamiToLastfm/app"
 	"xiamiToLastfm/lastfm"
 	"xiamiToLastfm/xiami"
-	"github.com/theherk/viper"
 )
 
 var debug bool
diff --git a/musicbrainz/mbid.go b/musicbrainz/mbid.go
index 786ff86..c42c142 100644
--- a/musicbrainz/mbid.go
+++ b/musicbrainz/mbid.go
@@ -1,13 +1,14 @@
 package musicbrainz
 
 import (
+	"encoding/xml"
 	"fmt"
-	"net/url"
+	"io/ioutil"
 	"log"
 	"net/http"
-	"io/ioutil"
-	"encoding/xml"
-	"github.com/theherk/viper"
+	"net/url"
+
+	"github.com/spf13/viper"
 )
 
 // get record's MBID from its title, artist and album.
diff --git a/musicbrainz/mbid_test.go b/musicbrainz/mbid_test.go
index 1cb48bb..76f07f7 100644
--- a/musicbrainz/mbid_test.go
+++ b/musicbrainz/mbid_test.go
@@ -2,6 +2,7 @@ package musicbrainz
 
 import (
 	"testing"
+
 	"github.com/stretchr/testify/assert"
 )
 
diff --git a/xiami/xiami.go b/xiami/xiami.go
index 934fb5e..544eaf6 100644
--- a/xiami/xiami.go
+++ b/xiami/xiami.go
@@ -12,7 +12,7 @@ import (
 	"time"
 
 	"github.com/PuerkitoBio/goquery"
-	"github.com/theherk/viper"
+	"github.com/spf13/viper"
 )
 
 const (
diff --git a/xiami/xiami_test.go b/xiami/xiami_test.go
index f292def..cd6ae8d 100644
--- a/xiami/xiami_test.go
+++ b/xiami/xiami_test.go
@@ -27,6 +27,6 @@ func TestGetAlbum(t *testing.T) {
 	url := "https://www.xiami.com/song/mSJtnV7aa77?spm=a1z1s.6626017.0.0.nGwy1E"
 	artist, album, ok := album(url)
 	assert.True(t, ok)
-	assert.Equal(t, "川井憲次" ,artist)
-	assert.Equal(t, "NHKスペシャル「人体 神秘の巨大ネットワーク」オリジナル・サウンドトラック" ,album)
+	assert.Equal(t, "川井憲次", artist)
+	assert.Equal(t, "NHKスペシャル「人体 神秘の巨大ネットワーク」オリジナル・サウンドトラック", album)
 }
diff --git a/xiami_test.go b/xiami_test.go
index 0eb5f9a..45e47d3 100644
--- a/xiami_test.go
+++ b/xiami_test.go
@@ -2,12 +2,13 @@ package main
 
 import (
 	"testing"
-	"xiamiToLastfm/xiami"
+
 	"xiamiToLastfm/app"
+	"xiamiToLastfm/xiami"
 )
 
 func TestGetTracks(t *testing.T) {
-	app.InitConfig()
+	app.InitConfig("config.toml")
 	xiami.Init()
 
 	nowPlayingChan := make(chan xiami.Track)