Title: Https not being used by w3C
Last modified: December 31, 2018

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# Https not being used by w3C

 *  Resolved [katmacau](https://wordpress.org/support/users/katmacau/)
 * (@katmacau)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/https-not-being-used-by-w3c/)
 * I have a strange issue which has actually come up in a couple of sites using 
   W3TC where the cache isn’t using using https.
 * In the most recent site, it was originally built in http and then changed to 
   https. That was months ago. On my browsers the site is working. But on my clients
   computer she the site isn’t loading for her because assets are getting blocked
   that aren’t using https (eg the minified cache files, theme images etc).
 * What might be causing this? Is there setting for telling the browser that it 
   needs to refresh it’s cached files for the site?
 * Thanks.

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/)
 * (@vmarko)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/https-not-being-used-by-w3c/#post-11006956)
 * Hello,
 * In Performance>Browser, select Set cache control header with “cache with validation(“
   public, must-revalidate, proxy-revalidate””
    So you need to select Set cache 
   control header in General sub-box and in for relevant settings.
 *  Thread Starter [katmacau](https://wordpress.org/support/users/katmacau/)
 * (@katmacau)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/https-not-being-used-by-w3c/#post-11009695)
 * Thank you. I’ve applied those settings and will see how it goes.
 *  Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/)
 * (@vmarko)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/https-not-being-used-by-w3c/#post-11039548)
 * No activity over a week. Closing this topic
 *  Moderator [Jan Dembowski](https://wordpress.org/support/users/jdembowski/)
 * (@jdembowski)
 * Forum Moderator and Brute Squad
 * [7 years, 4 months ago](https://wordpress.org/support/topic/https-not-being-used-by-w3c/#post-11040596)
 * [@jacleaves](https://wordpress.org/support/users/jacleaves/) If you need support
   then per the forum guidelines please start your own topic.
 * [https://wordpress.org/support/guidelines/#post-in-the-best-place](https://wordpress.org/support/guidelines/#post-in-the-best-place)
 * You can do so here.
 * [https://wordpress.org/support/plugin/w3-total-cache/#new-post](https://wordpress.org/support/plugin/w3-total-cache/#new-post)

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Https not being used by w3C’ is closed to new replies.

 * ![](https://ps.w.org/w3-total-cache/assets/icon-256x256.png?rev=1041806)
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## Tags

 * [cache](https://wordpress.org/support/topic-tag/cache/)
 * [W3TC](https://wordpress.org/support/topic-tag/w3tc/)

 * 4 replies
 * 3 participants
 * Last reply from: [Jan Dembowski](https://wordpress.org/support/users/jdembowski/)
 * Last activity: [7 years, 4 months ago](https://wordpress.org/support/topic/https-not-being-used-by-w3c/#post-11040596)
 * Status: resolved