diff --git a/chat/chat.go b/chat/chat.go
index 00a2cda..9d25925 100644
--- a/chat/chat.go
+++ b/chat/chat.go
@@ -9,7 +9,7 @@ import (
 
 type Chat interface {
 	// user
-	GetUserUnreadMessages(ctx context.Context, params UserUnreadMessagesParams) (UserUnreadMessages, *errors.Error)
+	GetUserUnreadMessages(ctx context.Context, params UserUnreadMessagesParams) (UserUnreadMessagesResponse, *errors.Error)
 	GetUserJoinedChannelCount(ctx context.Context, params UserJoinedChannelCountParams) (resp UserJoinedChannelCountResponse, err *errors.Error)
 	CreateUser(ctx context.Context, request CreateUserRequest) (resp CreateUserResponse, err *errors.Error)
 
diff --git a/chat/chat_user.go b/chat/chat_user.go
index defc80d..741e63a 100644
--- a/chat/chat_user.go
+++ b/chat/chat_user.go
@@ -17,7 +17,7 @@ func (c *ChatImpl) CreateUser(ctx context.Context, request CreateUserRequest) (r
 	return
 }
 
-func (c *ChatImpl) GetUserUnreadMessages(ctx context.Context, params UserUnreadMessagesParams) (resp UserUnreadMessages, err *errors.Error) {
+func (c *ChatImpl) GetUserUnreadMessages(ctx context.Context, params UserUnreadMessagesParams) (resp UserUnreadMessagesResponse, err *errors.Error) {
 	url := fmt.Sprintf("/v3/users/%s/unread_message_count", params.UserID)
 	err = c.Client.Call(ctx, http.MethodGet, url, nil, nil, &resp)
 	if err != nil {
diff --git a/chat/chat_user_test.go b/chat/chat_user_test.go
index 52a9712..8e8a131 100644
--- a/chat/chat_user_test.go
+++ b/chat/chat_user_test.go
@@ -21,7 +21,7 @@ func (m *mockGetUserUnreadMessages) Call(ctx context.Context, method string, url
 		return args.Get(0).(*errors.Error)
 	}
 
-	result.(*UserUnreadMessages).UnreadCount = 10
+	result.(*UserUnreadMessagesResponse).UnreadCount = 10
 
 	return nil
 }
@@ -38,7 +38,7 @@ func TestGetUserUnreadMessages(t *testing.T) {
 		name         string
 		args         args
 		setupMock    func(m *mockGetUserUnreadMessages)
-		wantExpected UserUnreadMessages
+		wantExpected UserUnreadMessagesResponse
 		wantError    *errors.Error
 	}{
 		{
@@ -52,10 +52,10 @@ func TestGetUserUnreadMessages(t *testing.T) {
 					fmt.Sprintf("/v3/users/%s/unread_message_count", "111001100"),
 					http.Header(nil),
 					nil,
-					&UserUnreadMessages{},
+					&UserUnreadMessagesResponse{},
 				).Return(nil)
 			},
-			wantExpected: UserUnreadMessages{UnreadCount: 10},
+			wantExpected: UserUnreadMessagesResponse{UnreadCount: 10},
 			wantError:    nil,
 		},
 		{
@@ -69,7 +69,7 @@ func TestGetUserUnreadMessages(t *testing.T) {
 					fmt.Sprintf("/v3/users/%s/unread_message_count", "000000000"),
 					http.Header(nil),
 					nil,
-					&UserUnreadMessages{},
+					&UserUnreadMessagesResponse{},
 				).Return(errors.FromHTTPErr(400, []byte(`
 					{
 						"message": "\"User\" not found.",
@@ -78,7 +78,7 @@ func TestGetUserUnreadMessages(t *testing.T) {
 					}
 				`)))
 			},
-			wantExpected: UserUnreadMessages{},
+			wantExpected: UserUnreadMessagesResponse{},
 			wantError: errors.FromHTTPErr(400, []byte(`
 			{
 				"message": "\"User\" not found.",
diff --git a/chat/model_user.go b/chat/model_user.go
index d0e9a47..89b0654 100644
--- a/chat/model_user.go
+++ b/chat/model_user.go
@@ -1,6 +1,6 @@
 package chat
 
-type UserUnreadMessages struct {
+type UserUnreadMessagesResponse struct {
 	UnreadCount int `json:"unread_count"`
 }