OK… what am I missing?

Drupal 8.4.4 install, everything seems to be working fine, however I look at the Status Report, and I’m told I have 1 error. I look down the page a bit, and I see:

ACCESS TO UPDATE.PHP

Not protected

The update.php script is accessible to everyone without authentication check, which is a security risk. You must change the $settings[‘update_free_access’] value in your settings.php back to FALSE.

OK, Fine. So I open up my editor, I open up SETTINGS.PHP, and I look through it and I find line 321 says, and I quote:

$settings[‘update_free_access’] = FALSE;

So, I change permissions to 777, I SAVE the SETTINGS.PHP file once again, I set permissions back to 444 I refresh my screen to make sure it has all gone through, I go back into Drupal, I clear my caches, I refresh my browser and… I still get the same error message. 

Am I missing something? Am I just stupid? Help.

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/22/feed