New site has no .asp pages, How does this affect me

So we have given our online store/ marketing company the boot and have started doing everything inhouse. Our old site was built in a way that every page had a .asp on the end of the url. our new site is built with react, it has all the same links descriptions and content as google sees it but no .asp at the end of links, how will it affect my seo when i point my domain to the new site ?