diff --git a/system/src/Grav/Common/Plugin.php b/system/src/Grav/Common/Plugin.php
index be6f3aa25..40ae44bbe 100644
--- a/system/src/Grav/Common/Plugin.php
+++ b/system/src/Grav/Common/Plugin.php
@@ -140,7 +140,7 @@ class Plugin implements EventSubscriberInterface
 
         // Get default plugin configurations and retrieve page header configuration
         if (isset($page->header()->$class_name)) {
-            $header =  array_merge($defaults, $page->header()->$class_name);
+            $header =  array_replace_recursive($defaults, $page->header()->$class_name);
         } else {
             $header = $defaults;
         }