diff --git a/context.go b/context.go
index cd91dea..4819544 100644
--- a/context.go
+++ b/context.go
@@ -91,6 +91,8 @@ type (
 	}
 )
 
+var _ http.ResponseWriter = (*Context)(nil)
+
 var (
 	errSignKeyIsNil = hes.New("keys for sign cookie can't be nil")
 )
diff --git a/elton.go b/elton.go
index 9b5948c..d03a1ec 100644
--- a/elton.go
+++ b/elton.go
@@ -23,6 +23,7 @@
 package elton
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"io"
@@ -207,13 +208,18 @@ func (e *Elton) Close() error {
 	return e.Server.Close()
 }
 
+// Shutdown shotdown the http server
+func (e *Elton) Shutdown() error {
+	return e.Server.Shutdown(context.Background())
+}
+
 // GracefulClose graceful close the http server.
 // It sets the status to be closing and delay to close.
 func (e *Elton) GracefulClose(delay time.Duration) error {
 	atomic.StoreInt32(&e.status, StatusClosing)
 	time.Sleep(delay)
 	atomic.StoreInt32(&e.status, StatusClosed)
-	return e.Close()
+	return e.Shutdown()
 }
 
 // GetStatus get status of elton
diff --git a/go.mod b/go.mod
index 057c0c5..3d5709f 100644
--- a/go.mod
+++ b/go.mod
@@ -4,9 +4,9 @@ go 1.12
 
 require (
 	github.com/stretchr/testify v1.6.1
-	github.com/tidwall/gjson v1.6.4
+	github.com/tidwall/gjson v1.6.7
 	github.com/vicanso/fresh v1.0.0
-	github.com/vicanso/hes v0.2.4
+	github.com/vicanso/hes v0.3.0
 	github.com/vicanso/intranet-ip v0.0.1
 	github.com/vicanso/keygrip v1.1.0
 )
diff --git a/go.sum b/go.sum
index 402e603..0d0b80e 100644
--- a/go.sum
+++ b/go.sum
@@ -2,6 +2,7 @@ github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
@@ -9,14 +10,20 @@ github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/tidwall/gjson v1.6.4 h1:JKsCsJqRVFz8eYCsQ5E/ANRbK6CanAtA9IUvGsXklyo=
 github.com/tidwall/gjson v1.6.4/go.mod h1:BaHyNc5bjzYkPqgLq7mdVzeiRtULKULXLgZFKsxEHI0=
+github.com/tidwall/gjson v1.6.7 h1:Mb1M9HZCRWEcXQ8ieJo7auYyyiSux6w9XN3AdTpxJrE=
+github.com/tidwall/gjson v1.6.7/go.mod h1:zeFuBCIqD4sN/gmqBzZ4j7Jd6UcA2Fc56x7QFsv+8fI=
 github.com/tidwall/match v1.0.1 h1:PnKP62LPNxHKTwvHHZZzdOAOCtsJTjo6dZLCwpKm5xc=
 github.com/tidwall/match v1.0.1/go.mod h1:LujAq0jyVjBy028G1WhWfIzbpQfMO8bBZ6Tyb0+pL9E=
+github.com/tidwall/match v1.0.3 h1:FQUVvBImDutD8wJLN6c5eMzWtjgONK9MwIBCOrUJKeE=
+github.com/tidwall/match v1.0.3/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
 github.com/tidwall/pretty v1.0.2 h1:Z7S3cePv9Jwm1KwS0513MRaoUe3S01WPbLNV40pwWZU=
 github.com/tidwall/pretty v1.0.2/go.mod h1:XNkn88O1ChpSDQmQeStsy+sBenx6DDtFZJxhVysOjyk=
 github.com/vicanso/fresh v1.0.0 h1:u3ykbW6SYW5CbI6rx1lZCVfWKVIptvL6/2KOnrTKsTY=
 github.com/vicanso/fresh v1.0.0/go.mod h1:gr1RKSFxQ1OnQHzUMBHCigifni7KrXveJjWCTlPjICA=
 github.com/vicanso/hes v0.2.4 h1:pm4129ydQhGVfUZUELNgn0H9zvi/K6iIe77yAVgeW7c=
 github.com/vicanso/hes v0.2.4/go.mod h1:QcxOFmFfBQMhASTaLgnFayXYCgevdSeBVprt+o+3eKo=
+github.com/vicanso/hes v0.3.0 h1:atgM8+nBBdti7Ru0R84I7yh4fY4Yy9Ykq0K5EhMk77c=
+github.com/vicanso/hes v0.3.0/go.mod h1:QcxOFmFfBQMhASTaLgnFayXYCgevdSeBVprt+o+3eKo=
 github.com/vicanso/intranet-ip v0.0.1 h1:cYS+mExFsKqewWSuHtFwAqw/CO66GsheB/P1BPmSTx0=
 github.com/vicanso/intranet-ip v0.0.1/go.mod h1:bqQ6VUhxdz0ipSb1kzd6aoZStlp+pB7CTlVmVhgLAxA=
 github.com/vicanso/keygrip v1.1.0 h1:B+qtNe/vvgZbYlkbJC4cOsbY9MzNp23+m2+ZybRy45Q=