diff --git a/lib/block-supports/layout.php b/lib/block-supports/layout.php
index f3387aa1f2954..840caf0961d78 100644
--- a/lib/block-supports/layout.php
+++ b/lib/block-supports/layout.php
@@ -59,8 +59,8 @@ function gutenberg_render_layout_support_flag( $block_content, $block ) {
 		?>
 			<?php echo '.wp-container-' . $id; ?> > * {
 				max-width: <?php echo $content_size ? $content_size : $wide_size; ?>;
-				margin-left: auto;
-				margin-right: auto;
+				margin-left: auto !important;
+				margin-right: auto !important;
 			}
 
 			<?php echo '.wp-container-' . $id; ?> > .alignwide {
diff --git a/packages/block-editor/src/components/block-list/layout.js b/packages/block-editor/src/components/block-list/layout.js
index 3f898ae12c02f..e29fb8ab05cca 100644
--- a/packages/block-editor/src/components/block-list/layout.js
+++ b/packages/block-editor/src/components/block-list/layout.js
@@ -43,8 +43,8 @@ export function LayoutStyle( { selector, layout = {} } ) {
 			? `
 				${ appendSelectors( selector, '> *' ) } {
 					max-width: ${ contentSize ?? wideSize };
-					margin-left: auto;
-					margin-right: auto;
+					margin-left: auto !important;
+					margin-right: auto !important;
 				}
 
 				${ appendSelectors( selector, '> [data-align="wide"]' ) }  {