diff --git a/wp-content/themes/twentytwentyone/.stylelintrc.json b/wp-content/themes/twentytwentyone/.stylelintrc.json
index a7b1eb268b..c27cf371bb 100644
--- a/wp-content/themes/twentytwentyone/.stylelintrc.json
+++ b/wp-content/themes/twentytwentyone/.stylelintrc.json
@@ -10,6 +10,7 @@
 		"at-rule-empty-line-before": null,
 		"selector-pseudo-element-colon-notation": null,
 		"number-leading-zero": null,
-		"no-descending-specificity": null
+		"no-descending-specificity": null,
+		"length-zero-no-unit": [true, {"ignore": ["custom-properties"]}]
 	}
 }
diff --git a/wp-content/themes/twentytwentyone/assets/css/style-editor.css b/wp-content/themes/twentytwentyone/assets/css/style-editor.css
index dfa1d3f1a5..dd4834a25b 100644
--- a/wp-content/themes/twentytwentyone/assets/css/style-editor.css
+++ b/wp-content/themes/twentytwentyone/assets/css/style-editor.css
@@ -224,7 +224,7 @@
 	--widget--spacing-menu: calc(0.66 * var(--global--spacing-unit));
 
 	/* Admin-bar height */
-	--global--admin-bar--height: 0;
+	--global--admin-bar--height: 0px;
 }
 
 .admin-bar {
diff --git a/wp-content/themes/twentytwentyone/assets/sass/01-settings/global.scss b/wp-content/themes/twentytwentyone/assets/sass/01-settings/global.scss
index 45d6086ccc..91d845259a 100644
--- a/wp-content/themes/twentytwentyone/assets/sass/01-settings/global.scss
+++ b/wp-content/themes/twentytwentyone/assets/sass/01-settings/global.scss
@@ -227,7 +227,7 @@ $baseline-unit: 10px;
 	--widget--spacing-menu: calc(0.66 * var(--global--spacing-unit));
 
 	/* Admin-bar height */
-	--global--admin-bar--height: 0;
+	--global--admin-bar--height: 0px;
 }
 
 .admin-bar {
diff --git a/wp-content/themes/twentytwentyone/style-rtl.css b/wp-content/themes/twentytwentyone/style-rtl.css
index 253500d258..a97d91e8f2 100644
--- a/wp-content/themes/twentytwentyone/style-rtl.css
+++ b/wp-content/themes/twentytwentyone/style-rtl.css
@@ -317,7 +317,7 @@ Twenty Twenty-One is distributed under the terms of the GNU GPL.
 	--widget--spacing-menu: calc(0.66 * var(--global--spacing-unit));
 
 	/* Admin-bar height */
-	--global--admin-bar--height: 0;
+	--global--admin-bar--height: 0px;
 }
 
 .admin-bar {
diff --git a/wp-content/themes/twentytwentyone/style.css b/wp-content/themes/twentytwentyone/style.css
index 3e904fb34d..a311ccc6db 100644
--- a/wp-content/themes/twentytwentyone/style.css
+++ b/wp-content/themes/twentytwentyone/style.css
@@ -317,7 +317,7 @@ Twenty Twenty-One is distributed under the terms of the GNU GPL.
 	--widget--spacing-menu: calc(0.66 * var(--global--spacing-unit));
 
 	/* Admin-bar height */
-	--global--admin-bar--height: 0;
+	--global--admin-bar--height: 0px;
 }
 
 .admin-bar {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 2ccd2dd954..a3f96270e7 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-alpha-50974';
+$wp_version = '5.8-alpha-50975';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.