diff --git a/example/full/cmd.go b/example/full/cmd.go
index 8559212..89ef7cc 100644
--- a/example/full/cmd.go
+++ b/example/full/cmd.go
@@ -37,9 +37,10 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"time"
+
 	"github.com/mars315/autoflags"
 	"github.com/spf13/cobra"
-	"time"
 )
 
 func main() {
diff --git a/example/simple/cmd.go b/example/simple/cmd.go
index ffdede0..820708b 100644
--- a/example/simple/cmd.go
+++ b/example/simple/cmd.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+
 	"github.com/mars315/autoflags"
 	"github.com/spf13/cobra"
 )
diff --git a/flag.go b/flag.go
index 4f3d467..9a107dd 100644
--- a/flag.go
+++ b/flag.go
@@ -66,11 +66,11 @@ package autoflags
 
 import (
 	"fmt"
-	"github.com/mars315/autoflags/lib/stringx"
 	"reflect"
 	"strings"
 	"time"
 
+	"github.com/mars315/autoflags/lib/stringx"
 	"github.com/mitchellh/mapstructure"
 	"github.com/spf13/cobra"
 	flag "github.com/spf13/pflag"
@@ -430,7 +430,6 @@ func parseTag(field reflect.StructField, cfg *FlagConfig) *tagData {
 
 // getTag .
 func getTag(field reflect.StructField, cfg *FlagConfig) *tagData {
-
 	fulls, ok := field.Tag.Lookup(cfg.tagName)
 
 	// ignore untagged field
diff --git a/lib/stringx/string.go b/lib/stringx/string.go
index d7e9fe4..fb9e9df 100644
--- a/lib/stringx/string.go
+++ b/lib/stringx/string.go
@@ -7,9 +7,10 @@
 package stringx
 
 import (
-	"github.com/mars315/autoflags/lib/builtin"
 	"strconv"
 	"strings"
+
+	"github.com/mars315/autoflags/lib/builtin"
 )
 
 func ToBool(s string) bool {