My League of Legends Client keeps updating when i lounch him (1424.0MB)

When i open my League of Legends,i get message:,,League of Legends needs to apply required update." and it restart automaticly.I waited once.League of Legends worked normally.Tomorow i opened League and again same thing.I waited again.I signed in and loged out.When i opened Client again same update (1424.0MB).I don't want to wait anymore,Riot please help me!