You have to keep your WordPress website updated to the latest version. This is what we do all day at West Bay Media Group. Here is the latest update!
After almost sixty million downloads of WordPress 4.7, we are pleased to announce the immediate availability of WordPress 4.7.4, a maintenance release. This release contains 47 bug fixes and enhancements, chief among them an incompatibility between the upcoming Chrome version and the visual editor, inconsistencies in media handling, and further improvements to the REST API.– https://wordpress.org/news/2017/04/wordpress-4-7-4/