Chrome will start to show security warnings on http:// websites
Starting October 2017, Chrome (version 62) will show a “NOT SECURE” warning when users enter text in a form on an HTTP page, and for all HTTP pages in Incognito mode.
The new warning is part of a long term plan to mark all pages served over HTTP as “not secure”.
Here’s how to fix this problem:
Migrate to HTTPS
To prevent the “Not Secure” notification from appearing when Chrome users visit your site, only collect user input data on pages served using HTTPS.
Read about HTTPS