diff --git a/functions.php b/functions.php
index 74e2d772..6b9705a4 100644
--- a/functions.php
+++ b/functions.php
@@ -8,8 +8,6 @@
  * @since UCSC 1.0.0
  */
 
-use Image_Sizes;
-
 if ( ! function_exists( 'ucsc_setup' ) ) :
 
 	/**
diff --git a/patterns/sidebar-with-navigation.php b/patterns/sidebar-with-navigation.php
index 4db96420..a6ec2ec3 100644
--- a/patterns/sidebar-with-navigation.php
+++ b/patterns/sidebar-with-navigation.php
@@ -12,7 +12,7 @@
 <h3 class="wp-block-heading has-base-font-size"><strong>Navigation header</strong></h3>
 <!-- /wp:heading -->
 
-<!-- wp:navigation {"ref":2910,"overlayMenu":"never","layout":{"type":"flex","orientation":"vertical","justifyContent":"stretch"}} /--></div>
+<!-- wp:navigation { "maxNestingLevel": 1,"overlayMenu":"never","layout":{"type":"flex","orientation":"vertical","justifyContent":"stretch"}} /--></div>
 <!-- /wp:column -->
 
 <!-- wp:column {"width":"66.66%"} -->
diff --git a/theme.json b/theme.json
index 8a67be9f..ad8f7af7 100644
--- a/theme.json
+++ b/theme.json
@@ -346,6 +346,7 @@
 				}
 			},
 			"core/navigation": {
+			    "maxNestingLevel": 1,
 				"typography": {
 					"customFontSize": false
 				},
@@ -541,4 +542,4 @@
 		}
 	},
 	"customTemplates": []
-}
\ No newline at end of file
+}