Theme update : Download fail : Error

Everytime, I would try to update to WordPress 4.0, I get this message:

Downloading update from http://wordpress.org/wordpress-4.0-new-bundled.zip…

Download failed.: error setting certificate verify locations: CAfile: /usr/local/share/certs/ca-root-nss.crt CApath: none

Installation Failed

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I can’t install any other themes either. It gives me the same error message:

Installing Theme: Customizr 3.1.24
Downloading install package from http://wordpress.org/themes/download/customizr.3.1.24.zip…

Download failed. error setting certificate verify locations: CAfile: /usr/local/share/certs/ca-root-nss.crt CApath: none