diff --git a/app/routes.go b/app/routes.go
index c4e8612..4c7d31c 100644
--- a/app/routes.go
+++ b/app/routes.go
@@ -135,7 +135,7 @@ func (app *App) handleSlashCommand(w http.ResponseWriter, r *http.Request) {
 	ctx.UserID = s.UserID
 
 	go func() {
-		params, _ := ctx.getSlackMessage(s.TeamID, s.Text)
+		params, _ := ctx.getSlackMessage(s)
 		b, _ := json.Marshal(params)
 		http.Post(s.ResponseURL, "application/json", bytes.NewBuffer(b))
 	}()
diff --git a/app/slack.go b/app/slack.go
index 512fb44..4c80ebc 100644
--- a/app/slack.go
+++ b/app/slack.go
@@ -150,7 +150,9 @@ func (ctx *Context) getChannelSelectSlackMessage() (*slack.Msg, error) {
 	}, nil
 }
 
-func (ctx *Context) getSlackMessage(team, text string) (*slack.Msg, error) {
+func (ctx *Context) getSlackMessage(command slack.SlashCommand) (*slack.Msg, error) {
+	text := command.Text
+	team := command.TeamID
 	client := ctx.createTimeTableClient()
 	if client.HTTPClient == nil || text == "login" {
 		return ctx.getLoginSlackMessage(team)
diff --git a/app/slack_test.go b/app/slack_test.go
index de9798e..eca276e 100644
--- a/app/slack_test.go
+++ b/app/slack_test.go
@@ -167,7 +167,7 @@ func TestGetSlackMessage(t *testing.T) {
 	req, _ := http.NewRequest(http.MethodPost, "https://example.com/hooks/slash", bytes.NewBufferString(""))
 	ctx := app.createContext(req)
 	ctx.UserID = "BAZ"
-	msg, err := ctx.getSlackMessage("T12345678", "")
+	msg, err := ctx.getSlackMessage(slack.SlashCommand{TeamID: "T12345678"})
 	for _, test := range []Test{
 		{true, err == nil},
 		{"TeamSpirit で認証を行って、再度 `/ts` コマンドを実行してください :bow:", msg.Attachments[0].Text},
@@ -181,7 +181,7 @@ func TestGetSlackMessage(t *testing.T) {
 		TokenType:    "Bearer",
 	})
 	ctx.TimeTableClient = nil
-	msg, err = ctx.getSlackMessage("T12345678", "")
+	msg, err = ctx.getSlackMessage(slack.SlashCommand{TeamID: "T12345678"})
 	for _, test := range []Test{
 		{true, err == nil},
 		{"TeamSpirit で認証を行って、再度 `/ts` コマンドを実行してください :bow:", msg.Attachments[0].Text},
@@ -193,7 +193,7 @@ func TestGetSlackMessage(t *testing.T) {
 		{null.IntFrom(10 * 60), null.IntFrom(19 * 60), 1},
 	}, nil)
 	ctx.TimeTableClient = nil
-	msg, err = ctx.getSlackMessage("T12345678", "channel")
+	msg, err = ctx.getSlackMessage(slack.SlashCommand{TeamID: "T12345678", Text: "channel"})
 	for _, test := range []Test{
 		{true, err == nil},
 		{"Slack で認証を行って、再度 `/ts channel` コマンドを実行してください :bow:", msg.Attachments[0].Text},
@@ -206,7 +206,7 @@ func TestGetSlackMessage(t *testing.T) {
 	}, nil)
 	ctx.TimeTableClient = nil
 	ctx.setSlackAccessToken("foo")
-	msg, err = ctx.getSlackMessage("T12345678", "channel")
+	msg, err = ctx.getSlackMessage(slack.SlashCommand{TeamID: "T12345678", Text: "channel"})
 	for _, test := range []Test{
 		{true, err == nil},
 		{"打刻時に通知するチャネルを選択して下さい", msg.Attachments[0].Text},
@@ -217,7 +217,7 @@ func TestGetSlackMessage(t *testing.T) {
 		{null.IntFrom(10 * 60), null.IntFrom(19 * 60), 1},
 	}, nil)
 	ctx.TimeTableClient = nil
-	msg, err = ctx.getSlackMessage("T12345678", "")
+	msg, err = ctx.getSlackMessage(slack.SlashCommand{TeamID: "T12345678"})
 	for _, test := range []Test{
 		{true, err == nil},
 		{"既に退勤済です。打刻修正は <https://teamspirit-1234.cloudforce.test|TeamSpirit> で行なってください。", msg.Text},
@@ -230,7 +230,7 @@ func TestGetSlackMessage(t *testing.T) {
 		{null.IntFrom(10 * 60), null.IntFromPtr(nil), 21},
 	}, &[]bool{false}[0])
 	ctx.TimeTableClient = nil
-	msg, err = ctx.getSlackMessage("T12345678", "")
+	msg, err = ctx.getSlackMessage(slack.SlashCommand{TeamID: "T12345678"})
 	for _, test := range []Test{
 		{true, err == nil},
 		{"休憩を終了する", msg.Attachments[0].Actions[0].Text},
@@ -244,7 +244,7 @@ func TestGetSlackMessage(t *testing.T) {
 		{null.IntFrom(10 * 60), null.IntFromPtr(nil), 21},
 	}, &[]bool{false}[0])
 	ctx.TimeTableClient = nil
-	msg, err = ctx.getSlackMessage("T12345678", "")
+	msg, err = ctx.getSlackMessage(slack.SlashCommand{TeamID: "T12345678"})
 	for _, test := range []Test{
 		{true, err == nil},
 		{"休憩を終了する", msg.Attachments[0].Actions[0].Text},
@@ -258,7 +258,7 @@ func TestGetSlackMessage(t *testing.T) {
 		{null.IntFrom(10 * 60), null.IntFrom(11 * 60), 21},
 	}, &[]bool{false}[0])
 	ctx.TimeTableClient = nil
-	msg, err = ctx.getSlackMessage("T12345678", "")
+	msg, err = ctx.getSlackMessage(slack.SlashCommand{TeamID: "T12345678"})
 	for _, test := range []Test{
 		{true, err == nil},
 		{"休憩を開始する", msg.Attachments[0].Actions[0].Text},
@@ -274,7 +274,7 @@ func TestGetSlackMessage(t *testing.T) {
 		{null.IntFrom(10 * 60), null.IntFrom(11 * 60), 21},
 	}, &[]bool{false}[0])
 	ctx.TimeTableClient = nil
-	msg, err = ctx.getSlackMessage("T12345678", "")
+	msg, err = ctx.getSlackMessage(slack.SlashCommand{TeamID: "T12345678"})
 	for _, test := range []Test{
 		{true, err == nil},
 		{"出勤する", msg.Attachments[0].Actions[0].Text},
@@ -285,7 +285,7 @@ func TestGetSlackMessage(t *testing.T) {
 	}
 	setupTimeTableGocks([]timeTableItem{}, &[]bool{true}[0])
 	ctx.TimeTableClient = nil
-	msg, err = ctx.getSlackMessage("T12345678", "")
+	msg, err = ctx.getSlackMessage(slack.SlashCommand{TeamID: "T12345678"})
 	for _, test := range []Test{
 		{true, err == nil},
 		{"本日は休日です :sunny:", msg.Text},