Can I upgrade my Toshiba Satellite S70-A-11L GPU and CPU?

Cptwiggle

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May 20, 2015
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I bought my Toshiba laptop a little while ago now and i was wondering if it would be possible to upgrade either the cpu or gpu?
Currently i have a Core i3-4000m and the GT740m dedicated graphics card.
I have 8GB of RAM and can play most games i am interested in around low-medium however newer games that i should be able to run at the lowest settings (not impressively well) But the frames drop every few seconds.

Is it possible to change either in this laptop? Also any recommendations for which i could upgrade to if i can would be great thanks!