diff --git a/post-content.php b/post-content.php
index 2d65eeff8b87c..0bdeb30733f6c 100644
--- a/post-content.php
+++ b/post-content.php
@@ -6,7 +6,7 @@
  */
 
 ?>
-<!-- wp:cover {"url":"https://cldup.com/Fz-ASbo2s3.jpg","className":"alignwide"} -->
+<!-- wp:cover {"url":"https://cldup.com/Fz-ASbo2s3.jpg","align":"wide"} -->
 <div class="wp-block-cover has-background-dim alignwide" style="background-image:url(https://cldup.com/Fz-ASbo2s3.jpg)"><div class="wp-block-cover__inner-container"><!-- wp:paragraph {"align":"center","placeholder":"Write title…","textColor":"white","fontSize":"large"} -->
 <p class="has-text-align-center has-white-color has-text-color has-large-font-size"><?php _e( 'Of Mountains &amp; Printing Presses', 'gutenberg' ); ?></p>
 <!-- /wp:paragraph --></div></div>