diff --git a/.github/workflows/mps.yml b/.github/workflows/mps.yml
index 3c09d61..989b66b 100644
--- a/.github/workflows/mps.yml
+++ b/.github/workflows/mps.yml
@@ -16,7 +16,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@v2
       with:
-        go-version: ^1.13
+        go-version: ^1.16
       id: go
 
     - name: Check out code into the Go module directory
diff --git a/_examples/reverse-proxy/main.go b/_examples/reverse-proxy/main.go
index ff1a04b..3c39779 100644
--- a/_examples/reverse-proxy/main.go
+++ b/_examples/reverse-proxy/main.go
@@ -2,14 +2,15 @@ package main
 
 import (
 	"errors"
-	"github.com/telanflow/mps"
-	"github.com/telanflow/mps/middleware"
 	"log"
 	"net/http"
 	"net/url"
 	"os"
 	"os/signal"
 	"syscall"
+
+	"github.com/telanflow/mps"
+	"github.com/telanflow/mps/middleware"
 )
 
 // A simple reverse proxy server
diff --git a/_examples/simple-http-proxy/main.go b/_examples/simple-http-proxy/main.go
index 428cb1b..d48f27f 100644
--- a/_examples/simple-http-proxy/main.go
+++ b/_examples/simple-http-proxy/main.go
@@ -2,13 +2,14 @@ package main
 
 import (
 	"errors"
-	"github.com/telanflow/mps"
 	"log"
 	"net/http"
 	"os"
 	"os/signal"
 	"regexp"
 	"syscall"
+
+	"github.com/telanflow/mps"
 )
 
 // A simple http proxy server
diff --git a/_examples/websocket-proxy/main.go b/_examples/websocket-proxy/main.go
index 3c3e7fa..9a7ea02 100644
--- a/_examples/websocket-proxy/main.go
+++ b/_examples/websocket-proxy/main.go
@@ -2,18 +2,19 @@ package main
 
 import (
 	"errors"
-	"github.com/gorilla/websocket"
-	"github.com/telanflow/mps"
 	"log"
 	"net/http"
 	"net/url"
 	"os"
 	"os/signal"
 	"syscall"
+
+	"github.com/gorilla/websocket"
+	"github.com/telanflow/mps"
 )
 
 var (
-	upgrader = websocket.Upgrader{}
+	upgrader     = websocket.Upgrader{}
 	endPointAddr = "localhost:9990"
 )
 
@@ -73,4 +74,3 @@ func main() {
 	_ = srv.Close()
 	log.Fatal("WebsocketProxy server stop!")
 }
-
diff --git a/middleware/singleHostReverseProxy.go b/middleware/singleHostReverseProxy.go
index 762c76f..bec6987 100644
--- a/middleware/singleHostReverseProxy.go
+++ b/middleware/singleHostReverseProxy.go
@@ -1,10 +1,11 @@
 package middleware
 
 import (
-	"github.com/telanflow/mps"
 	"net/http"
 	"net/url"
 	"strings"
+
+	"github.com/telanflow/mps"
 )
 
 // SingleHostReverseProxy returns a mps.Middleware