https://googleonlinesecurity.blogspot.com/2015/12/an-update-on-sha-1-certificates-in.html [googleonlinesecurity.blogspot.com]

An update on SHA-1 certificates in Chrome

As announced last September and supported by further recent research, Google Chrome does not treat SHA-1 certificates as secure anymore, and will completely stop supporting them over the next year. Chrome will discontinue support in two steps: first, blocking new SHA-1 certificates; and second, blocking all SHA-1 certificates.