Apache's 000-default.conf - weird behaviour

I'm trying to achieve a redirect from example.com to www.example.com (non-www to www). My **sites-available/example.com.conf** file looks like this; ServerName www.example.com ServerAdmin unidan@example.com DocumentRoot /var/www/example.com/public_html ErrorLog /var/www/example.com/logs/error.log CustomLog /var/www/example.com/logs/access.log combined ServerName example.com Redirect permanent / http://www.example.com ServerName example.com Redirect permanent / https://www.example.com My **sites-available/000-default.conf** file looks like this; ServerAdmin zuckerberg@facebook.com DocumentRoot /var/www/default/public_html ErrorLog ${APACHE_LOG_DIR}/error.log CustomLog ${APACHE_LOG_DIR}/access.log combined Now.. when requesting http://www.example.com it will respond as requested. However, when requesting http://example.com it will render the request using the configuration in 000-default.conf. Unlinking 000-default.conf from sites-enabled/ will fix this issue, however this is not something I want to do (I want to keep a default behaviour for unknown requests). What is the issue here? Why does the configuration in 000-default.conf override the redirect?