change to https

Hi, I am using Catch Kathmandu for site "https://nextream.bz". I changed url from http to https on general setting of WordPress, and the site appears correctly. However, when I search this site by google search and click nextream.bz, http://nextream.bz appears. By seeing source code, it still shows http://nextream.bz. (see screenshot: https://nextream.bz/test/screenshot.png) And I think I also need to change canonical. Could you let me know how I can change it? Thank you, Sumiko