diff --git a/README.md b/README.md
index 4048786..c1959b2 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@
 
     ```bash
     $ git clone https://github.com/rosbit/go-wxpay-gateway
-    $ cd go-wx-gateway
+    $ cd go-wxpay-gateway
     $ make
     ```
  3. 编译成功，会得到3个可执行程序
diff --git a/getsandbox.go b/getsandbox.go
index 7a1672f..08725cc 100644
--- a/getsandbox.go
+++ b/getsandbox.go
@@ -4,8 +4,8 @@
 package main
 
 import (
-	"github.com/rosbit/go-wxpay-gateway/wx-pay-api"
-	"github.com/rosbit/go-wxpay-gateway/conf"
+	"go-wxpay-gateway/wx-pay-api"
+	"go-wxpay-gateway/conf"
 	"fmt"
 )
 
diff --git a/go.mod b/go.mod
index 14cc45a..6102170 100644
--- a/go.mod
+++ b/go.mod
@@ -1,4 +1,4 @@
-module github.com/rosbit/go-wxpay-gateway
+module go-wxpay-gateway
 
 go 1.12
 
diff --git a/main.go b/main.go
index b2dd130..636ef1f 100644
--- a/main.go
+++ b/main.go
@@ -8,7 +8,7 @@ package main
 import (
 	"os"
 	"fmt"
-	"github.com/rosbit/go-wxpay-gateway/conf"
+	"go-wxpay-gateway/conf"
 )
 
 // variables set via go build -ldflags
diff --git a/notify-service.go b/notify-service.go
index 7593e4f..d0fefe1 100644
--- a/notify-service.go
+++ b/notify-service.go
@@ -7,8 +7,8 @@ package main
 
 import (
 	lm "github.com/rosbit/logmerger"
-	"github.com/rosbit/go-wxpay-gateway/conf"
-	"github.com/rosbit/go-wxpay-gateway/utils"
+	"go-wxpay-gateway/conf"
+	"go-wxpay-gateway/utils"
 )
 
 func StartService() error {
diff --git a/rest/rest-close-order.go b/rest/rest-close-order.go
index b91ed04..a005c02 100644
--- a/rest/rest-close-order.go
+++ b/rest/rest-close-order.go
@@ -2,8 +2,8 @@ package rest
 
 import (
 	"net/http"
-	"github.com/rosbit/go-wxpay-gateway/conf"
-	"github.com/rosbit/go-wxpay-gateway/wx-pay-api"
+	"go-wxpay-gateway/conf"
+	"go-wxpay-gateway/wx-pay-api"
 )
 
 // POST /queryorder
diff --git a/rest/rest-notify.go b/rest/rest-notify.go
index 800d76e..abc77c8 100644
--- a/rest/rest-notify.go
+++ b/rest/rest-notify.go
@@ -5,9 +5,9 @@ import (
 	"fmt"
 	"log"
 	"io/ioutil"
-	"github.com/rosbit/go-wxpay-gateway/conf"
-	"github.com/rosbit/go-wxpay-gateway/wx-pay-api"
-	"github.com/rosbit/go-wxpay-gateway/utils"
+	"go-wxpay-gateway/conf"
+	"go-wxpay-gateway/wx-pay-api"
+	"go-wxpay-gateway/utils"
 )
 
 const (
diff --git a/rest/rest-pay.go b/rest/rest-pay.go
index 392f5f5..e2cb852 100644
--- a/rest/rest-pay.go
+++ b/rest/rest-pay.go
@@ -4,8 +4,8 @@ import (
 	"net/http"
 	"fmt"
 	"encoding/json"
-	"github.com/rosbit/go-wxpay-gateway/conf"
-	"github.com/rosbit/go-wxpay-gateway/wx-pay-api"
+	"go-wxpay-gateway/conf"
+	"go-wxpay-gateway/wx-pay-api"
 )
 
 const (
diff --git a/rest/rest-query-order.go b/rest/rest-query-order.go
index 98150db..c6b6f33 100644
--- a/rest/rest-query-order.go
+++ b/rest/rest-query-order.go
@@ -2,8 +2,8 @@ package rest
 
 import (
 	"net/http"
-	"github.com/rosbit/go-wxpay-gateway/conf"
-	"github.com/rosbit/go-wxpay-gateway/wx-pay-api"
+	"go-wxpay-gateway/conf"
+	"go-wxpay-gateway/wx-pay-api"
 )
 
 // POST /queryorder
diff --git a/rest/rest-refund.go b/rest/rest-refund.go
index a5d334b..b9fe138 100644
--- a/rest/rest-refund.go
+++ b/rest/rest-refund.go
@@ -2,8 +2,8 @@ package rest
 
 import (
 	"net/http"
-	"github.com/rosbit/go-wxpay-gateway/conf"
-	"github.com/rosbit/go-wxpay-gateway/wx-pay-api"
+	"go-wxpay-gateway/conf"
+	"go-wxpay-gateway/wx-pay-api"
 )
 
 // POST /refundment
diff --git a/rest/sandbox-utils.go b/rest/sandbox-utils.go
index 71b13a7..f2cfd1a 100644
--- a/rest/sandbox-utils.go
+++ b/rest/sandbox-utils.go
@@ -1,17 +1,13 @@
 package rest
 
+import (
+	"strings"
+)
+
 const (
 	SANDBOX_SUFFIX = "-dev" // pay-app名称有该后缀，表示使用sandbox方式
 )
 
 func _IsSandbox(payApp string) (isSandbox bool) {
-	sl := len(SANDBOX_SUFFIX)
-	al := len(payApp)
-	if al <= sl {
-		return false
-	}
-	if payApp[al-sl:] == SANDBOX_SUFFIX {
-		return true
-	}
-	return false
+	return strings.HasSuffix(payApp, SANDBOX_SUFFIX)
 }
diff --git a/router-gateway.go b/router-gateway.go
index 93e99ef..b896e82 100644
--- a/router-gateway.go
+++ b/router-gateway.go
@@ -11,10 +11,10 @@ import (
 	"github.com/gernest/alien"
 	"net/http"
 	"fmt"
-	"github.com/rosbit/go-wxpay-gateway/conf"
-	"github.com/rosbit/go-wxpay-gateway/rest"
-	"github.com/rosbit/go-wxpay-gateway/wx-pay-api"
-	"github.com/rosbit/go-wxpay-gateway/utils"
+	"go-wxpay-gateway/conf"
+	"go-wxpay-gateway/rest"
+	"go-wxpay-gateway/wx-pay-api"
+	"go-wxpay-gateway/utils"
 )
 
 func StartService() error {
diff --git a/utils/notify-service.go b/utils/notify-service.go
index 3a7c7ce..85d433e 100644
--- a/utils/notify-service.go
+++ b/utils/notify-service.go
@@ -16,7 +16,7 @@ import (
 	"strconv"
 	"time"
 	"log"
-	"github.com/rosbit/go-wxpay-gateway/conf"
+	"go-wxpay-gateway/conf"
 )
 
 const (