diff --git a/src/components/starlight/MarkdownContent.astro b/src/components/starlight/MarkdownContent.astro
index 4a49aebef..77b3b842c 100644
--- a/src/components/starlight/MarkdownContent.astro
+++ b/src/components/starlight/MarkdownContent.astro
@@ -18,7 +18,7 @@ const classList = [
 
 <style>
   .sl-markdown-content:not(.homepage) {
-    :is(h1, h2, h3, h4, h5, h6) {
+    :is(h1, h2, h3, h4, h5, h6):not(.starlight-aside__title) {
       color: var(--sl-color-heading);
       line-height: var(--sl-line-height-headings);
       scroll-margin-top: -0.5rem;
diff --git a/src/plugins/nucleus-remark-aside.js b/src/plugins/nucleus-remark-aside.js
index b23a7f58a..94a407219 100644
--- a/src/plugins/nucleus-remark-aside.js
+++ b/src/plugins/nucleus-remark-aside.js
@@ -129,10 +129,10 @@ export function nucleusRemarkAside() {
         'aside',
         {
           'aria-label': title,
-          class: `starlight-aside starlight-aside--${variant}`,
+          class: `starlight-aside starlight-aside--${variant} not-content`,
         },
         [
-          h('p', { class: 'starlight-aside__title', 'aria-hidden': 'true' }, [
+          h('h3', { class: 'starlight-aside__title' }, [
             s(
               'svg',
               {
@@ -141,6 +141,7 @@ export function nucleusRemarkAside() {
                 height: 16,
                 fill: 'currentColor',
                 class: 'starlight-aside__icon',
+                'aria-hidden': 'true'
               },
               iconPaths[variant]
             ),