diff --git a/go.sum b/go.sum
index 90b2a7e3..e84b0ead 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,4 @@
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/line/line-bot-sdk-go/v7 v7.14.0 h1:SL19vemo5zGvZQsTKfdo+mkMN3MY0EdykpDLyVP1GbQ=
-github.com/line/line-bot-sdk-go/v7 v7.14.0/go.mod h1:WNSLxxBiXoGZtSfoiDKGTXu6pJJh8RGzj4AeNvSCWEs=
 github.com/line/line-bot-sdk-go/v7 v7.15.0 h1:aX+MYza24GiAX+8vtnXZXZqYxPoWu+bWgu4GCPaV6/0=
 github.com/line/line-bot-sdk-go/v7 v7.15.0/go.mod h1:WNSLxxBiXoGZtSfoiDKGTXu6pJJh8RGzj4AeNvSCWEs=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
diff --git a/vendor/github.com/line/line-bot-sdk-go/v7/linebot/event.go b/vendor/github.com/line/line-bot-sdk-go/v7/linebot/event.go
index 81da7a27..bc333f7b 100644
--- a/vendor/github.com/line/line-bot-sdk-go/v7/linebot/event.go
+++ b/vendor/github.com/line/line-bot-sdk-go/v7/linebot/event.go
@@ -189,6 +189,11 @@ const (
 	StickerResourceTypeNameText       StickerResourceType = "CUSTOM"
 )
 
+// DeliveryContext type
+type DeliveryContext struct {
+	IsRedelivery bool `json:"isRedelivery"`
+}
+
 // Event type
 type Event struct {
 	ReplyToken        string
@@ -206,6 +211,8 @@ type Event struct {
 	Members           []*EventSource
 	Unsend            *Unsend
 	VideoPlayComplete *VideoPlayComplete
+	WebhookEventID    string
+	DeliveryContext   DeliveryContext
 }
 
 type rawEvent struct {
@@ -223,6 +230,8 @@ type rawEvent struct {
 	Things            *rawThingsEvent      `json:"things,omitempty"`
 	Unsend            *Unsend              `json:"unsend,omitempty"`
 	VideoPlayComplete *VideoPlayComplete   `json:"videoPlayComplete,omitempty"`
+	WebhookEventID    string               `json:"webhookEventId"`
+	DeliveryContext   DeliveryContext      `json:"deliveryContext"`
 }
 
 type rawMemberEvent struct {
@@ -299,6 +308,8 @@ func (e *Event) MarshalJSON() ([]byte, error) {
 		Postback:          e.Postback,
 		Unsend:            e.Unsend,
 		VideoPlayComplete: e.VideoPlayComplete,
+		WebhookEventID:    e.WebhookEventID,
+		DeliveryContext:   e.DeliveryContext,
 	}
 	if e.Beacon != nil {
 		raw.Beacon = &rawBeaconEvent{
@@ -423,6 +434,8 @@ func (e *Event) UnmarshalJSON(body []byte) (err error) {
 	e.Mode = rawEvent.Mode
 	e.Timestamp = time.Unix(rawEvent.Timestamp/milliSecPerSec, (rawEvent.Timestamp%milliSecPerSec)*nanoSecPerMilliSec).UTC()
 	e.Source = rawEvent.Source
+	e.WebhookEventID = rawEvent.WebhookEventID
+	e.DeliveryContext = rawEvent.DeliveryContext
 
 	switch rawEvent.Type {
 	case EventTypeMessage:
diff --git a/vendor/github.com/line/line-bot-sdk-go/v7/linebot/raw.go b/vendor/github.com/line/line-bot-sdk-go/v7/linebot/raw.go
index 750e1fda..f542af80 100644
--- a/vendor/github.com/line/line-bot-sdk-go/v7/linebot/raw.go
+++ b/vendor/github.com/line/line-bot-sdk-go/v7/linebot/raw.go
@@ -27,7 +27,7 @@ func (client *Client) NewRawCall(method string, endpoint string) (*RawCall, erro
 		return nil, err
 	}
 	return &RawCall{
-		c: client,
+		c:   client,
 		req: req,
 	}, nil
 }
@@ -39,7 +39,7 @@ func (client *Client) NewRawCallWithBody(method string, endpoint string, body io
 		return nil, err
 	}
 	return &RawCall{
-		c: client,
+		c:   client,
 		req: req,
 	}, nil
 }
@@ -49,7 +49,7 @@ type RawCall struct {
 	c   *Client
 	ctx context.Context
 
-	req         *http.Request
+	req *http.Request
 }
 
 // AddHeader method
diff --git a/vendor/github.com/line/line-bot-sdk-go/v7/linebot/version.go b/vendor/github.com/line/line-bot-sdk-go/v7/linebot/version.go
index 39b06152..f04b4b90 100644
--- a/vendor/github.com/line/line-bot-sdk-go/v7/linebot/version.go
+++ b/vendor/github.com/line/line-bot-sdk-go/v7/linebot/version.go
@@ -16,4 +16,4 @@
 
 package linebot
 
-const version = "7.14.0"
+const version = "7.15.0"
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 009997e1..f210e680 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -1,3 +1,3 @@
-# github.com/line/line-bot-sdk-go/v7 v7.14.0
+# github.com/line/line-bot-sdk-go/v7 v7.15.0
 ## explicit; go 1.11
 github.com/line/line-bot-sdk-go/v7/linebot