diff --git a/gorush/global.go b/gorush/global.go
index b99149f..5e417b3 100644
--- a/gorush/global.go
+++ b/gorush/global.go
@@ -2,6 +2,7 @@ package gorush
 
 import (
 	"crypto/tls"
+
 	"github.com/Sirupsen/logrus"
 	"github.com/appleboy/gorush/config"
 	apns "github.com/sideshow/apns2"
diff --git a/gorush/log_test.go b/gorush/log_test.go
index e637231..92cbdc2 100644
--- a/gorush/log_test.go
+++ b/gorush/log_test.go
@@ -1,10 +1,11 @@
 package gorush
 
 import (
+	"testing"
+
 	"github.com/Sirupsen/logrus"
 	"github.com/appleboy/gorush/config"
 	"github.com/stretchr/testify/assert"
-	"testing"
 )
 
 func TestSetLogLevel(t *testing.T) {
diff --git a/gorush/notification.go b/gorush/notification.go
index 33d67e9..7ca9fba 100644
--- a/gorush/notification.go
+++ b/gorush/notification.go
@@ -3,14 +3,15 @@ package gorush
 import (
 	"errors"
 	"fmt"
-	"github.com/google/go-gcm"
-	apns "github.com/sideshow/apns2"
-	"github.com/sideshow/apns2/certificate"
-	"github.com/sideshow/apns2/payload"
 	"net/http"
 	"net/url"
 	"path/filepath"
 	"time"
+
+	"github.com/google/go-gcm"
+	apns "github.com/sideshow/apns2"
+	"github.com/sideshow/apns2/certificate"
+	"github.com/sideshow/apns2/payload"
 )
 
 // D provide string array
diff --git a/gorush/notification_test.go b/gorush/notification_test.go
index d6d2b88..f83f9c4 100644
--- a/gorush/notification_test.go
+++ b/gorush/notification_test.go
@@ -2,15 +2,16 @@ package gorush
 
 import (
 	"encoding/json"
+	"log"
+	"os"
+	"testing"
+	"time"
+
 	"github.com/appleboy/gorush/config"
 	"github.com/buger/jsonparser"
 	"github.com/google/go-gcm"
 	"github.com/sideshow/apns2"
 	"github.com/stretchr/testify/assert"
-	"log"
-	"os"
-	"testing"
-	"time"
 )
 
 func TestDisabledAndroidIosConf(t *testing.T) {
diff --git a/gorush/version.go b/gorush/version.go
index 45dd995..58c3ab0 100644
--- a/gorush/version.go
+++ b/gorush/version.go
@@ -2,8 +2,9 @@ package gorush
 
 import (
 	"fmt"
-	"github.com/gin-gonic/gin"
 	"runtime"
+
+	"github.com/gin-gonic/gin"
 )
 
 var version string
diff --git a/storage/boltdb/boltdb_test.go b/storage/boltdb/boltdb_test.go
index 265977b..743504e 100644
--- a/storage/boltdb/boltdb_test.go
+++ b/storage/boltdb/boltdb_test.go
@@ -1,9 +1,10 @@
 package boltdb
 
 import (
+	"testing"
+
 	c "github.com/appleboy/gorush/config"
 	"github.com/stretchr/testify/assert"
-	"testing"
 )
 
 func TestBoltDBEngine(t *testing.T) {
diff --git a/storage/buntdb/buntdb.go b/storage/buntdb/buntdb.go
index 7f423a5..559f689 100644
--- a/storage/buntdb/buntdb.go
+++ b/storage/buntdb/buntdb.go
@@ -2,9 +2,10 @@ package buntdb
 
 import (
 	"fmt"
+	"strconv"
+
 	"github.com/appleboy/gorush/config"
 	"github.com/tidwall/buntdb"
-	"strconv"
 )
 
 // Stat variable for redis
diff --git a/storage/buntdb/buntdb_test.go b/storage/buntdb/buntdb_test.go
index 2753f2d..0da440d 100644
--- a/storage/buntdb/buntdb_test.go
+++ b/storage/buntdb/buntdb_test.go
@@ -1,10 +1,11 @@
 package buntdb
 
 import (
-	c "github.com/appleboy/gorush/config"
-	"github.com/stretchr/testify/assert"
 	"os"
 	"testing"
+
+	c "github.com/appleboy/gorush/config"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestBuntDBEngine(t *testing.T) {
diff --git a/storage/leveldb/leveldb.go b/storage/leveldb/leveldb.go
index 7064c95..33307c5 100644
--- a/storage/leveldb/leveldb.go
+++ b/storage/leveldb/leveldb.go
@@ -2,9 +2,10 @@ package leveldb
 
 import (
 	"fmt"
+	"strconv"
+
 	"github.com/appleboy/gorush/config"
 	"github.com/syndtr/goleveldb/leveldb"
-	"strconv"
 )
 
 // Stat variable for redis
diff --git a/storage/leveldb/leveldb_test.go b/storage/leveldb/leveldb_test.go
index 82c9feb..6df0c04 100644
--- a/storage/leveldb/leveldb_test.go
+++ b/storage/leveldb/leveldb_test.go
@@ -1,10 +1,11 @@
 package leveldb
 
 import (
-	c "github.com/appleboy/gorush/config"
-	"github.com/stretchr/testify/assert"
 	"os"
 	"testing"
+
+	c "github.com/appleboy/gorush/config"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestLevelDBEngine(t *testing.T) {
diff --git a/storage/memory/memory_test.go b/storage/memory/memory_test.go
index 4d428a9..360581d 100644
--- a/storage/memory/memory_test.go
+++ b/storage/memory/memory_test.go
@@ -1,8 +1,9 @@
 package memory
 
 import (
-	"github.com/stretchr/testify/assert"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestMemoryEngine(t *testing.T) {
diff --git a/storage/redis/redis.go b/storage/redis/redis.go
index 2d30340..ce574eb 100644
--- a/storage/redis/redis.go
+++ b/storage/redis/redis.go
@@ -1,10 +1,11 @@
 package redis
 
 import (
-	"github.com/appleboy/gorush/config"
-	"gopkg.in/redis.v5"
 	"log"
 	"strconv"
+
+	"github.com/appleboy/gorush/config"
+	"gopkg.in/redis.v5"
 )
 
 // Stat variable for redis
diff --git a/storage/redis/redis_test.go b/storage/redis/redis_test.go
index e53b755..37e3ae1 100644
--- a/storage/redis/redis_test.go
+++ b/storage/redis/redis_test.go
@@ -1,9 +1,10 @@
 package redis
 
 import (
+	"testing"
+
 	c "github.com/appleboy/gorush/config"
 	"github.com/stretchr/testify/assert"
-	"testing"
 )
 
 func TestRedisServerError(t *testing.T) {