With the version 3.7, WordPress introduced a new feature called the Automatic updates. This feature allows WordPress to automatically update itself to the minor and security releases. However, by default the automatic updates are not enabled for major releases in order to avoid unexpected compatibility issues with existing themes and plugins.
Disable automatic updates for minor / security releases in WordPress
There could be several reasons you might not like the idea of automatic updates. Some developers often modify core WordPress files, or sometimes you might need to prepare your theme or plugins to make them compatible with the next update. Whatever be the case, switching to manual updates gives you a better control, allowing you to skip some minor updates (although not recommended) or updating as per your convenience.Read More