diff --git a/GlobalSettings.php b/GlobalSettings.php
index 61b6a58694..1d58fa3c3f 100644
--- a/GlobalSettings.php
+++ b/GlobalSettings.php
@@ -14,6 +14,9 @@
 
 	$wgCookieSameSite = 'None';
 	$wgUseSameSiteLegacyCookies = true;
+
+	// Only allow users with global accounts to login
+	$wgCentralAuthStrict = true;
 }
 
 if ( $wi->isExtensionActive( 'chameleon' ) ) {