Is there an adapter that will ensure my iphone 5s works in my docking station for my iphone 4?

I have a Pure siesta Idock (Dab alarm clock with docking station) which I used for my iPhone 3GS and my iPhone 4S.

I have ordered the Iphone 5s and would like to purchase an adapter to use with the docking station.

Do you recommend a specific one?

iPhone

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