diff --git a/types.go b/types.go
index 0843ab9..189731a 100644
--- a/types.go
+++ b/types.go
@@ -51,7 +51,7 @@ func (ch UpdatesChannel) Clear() {
 
 // User is a user on Telegram.
 type User struct {
-	ID           int    `json:"id"`
+	ID           int64  `json:"id"`
 	FirstName    string `json:"first_name"`
 	LastName     string `json:"last_name"`     // optional
 	UserName     string `json:"username"`      // optional