diff --git a/scripts/pi-hole/php/theme.php b/scripts/pi-hole/php/theme.php
index 21f5acf9..9e719810 100644
--- a/scripts/pi-hole/php/theme.php
+++ b/scripts/pi-hole/php/theme.php
@@ -36,7 +36,7 @@ if(isset($_POST["field"]) &&
 if(!array_key_exists($webtheme,$available_themes)) {
         // Fallback to default (light) theme is property is not set
         // or requested theme is not among the available
-        $webtheme = "default-light";
+        $webtheme = "default-auto";
 }
 
 $darkmode = $available_themes[$webtheme][1];