diff --git a/packages/shared/src/resolve-headers-from-tokens.ts b/packages/shared/src/resolve-headers-from-tokens.ts
index 52e407a..178517b 100644
--- a/packages/shared/src/resolve-headers-from-tokens.ts
+++ b/packages/shared/src/resolve-headers-from-tokens.ts
@@ -59,8 +59,8 @@ export const resolveHeadersFromTokens = (
   for (let i = 0; i < tokens.length; i += 1) {
     const token = tokens[i];
 
-    // if the token type does not match, skip
-    if (token?.type !== 'heading_open') {
+    // if the token type does not match, or the token level is not 0, skip
+    if (token?.type !== 'heading_open' || token?.level !== 0) {
       continue;
     }
 
diff --git a/packages/shared/tests/resolve-headers-from-tokens.spec.ts b/packages/shared/tests/resolve-headers-from-tokens.spec.ts
new file mode 100644
index 0000000..fb6918d
--- /dev/null
+++ b/packages/shared/tests/resolve-headers-from-tokens.spec.ts
@@ -0,0 +1,110 @@
+import type { MarkdownItHeader } from '@mdit-vue/types';
+import MarkdownIt from 'markdown-it';
+import { describe, expect, it } from 'vitest';
+import { resolveHeadersFromTokens, slugify } from '../src/index.js';
+
+describe('shared > resolve-headers-from-tokens', () => {
+  const md = MarkdownIt();
+
+  it('should resolve headers correctly', () => {
+    const source = `\
+# h1
+## h2
+### h3
+#### h4
+##### h5
+###### h6
+`;
+    const tokens = md.parse(source, {});
+    const expected: MarkdownItHeader[] = [
+      {
+        level: 1,
+        title: 'h1',
+        slug: 'h1',
+        link: '#h1',
+        children: [
+          {
+            level: 2,
+            title: 'h2',
+            slug: 'h2',
+            link: '#h2',
+            children: [
+              {
+                level: 3,
+                title: 'h3',
+                slug: 'h3',
+                link: '#h3',
+                children: [
+                  {
+                    level: 4,
+                    title: 'h4',
+                    slug: 'h4',
+                    link: '#h4',
+                    children: [],
+                  },
+                ],
+              },
+            ],
+          },
+        ],
+      },
+    ];
+
+    expect(
+      resolveHeadersFromTokens(tokens, {
+        level: [1, 2, 3, 4],
+        slugify,
+        shouldAllowHtml: false,
+        shouldEscapeText: false,
+      }),
+    ).toEqual(expected);
+  });
+
+  it('should not resolve headers in nested blocks', () => {
+    const source = `\
+> # h1 in blockquote
+> ## h2 in blockquote
+> ### h3
+> #### h4 in blockquote
+> ##### h5 in blockquote
+> ###### h6 in blockquote
+
+- # h1 in list
+- ## h2 in list
+- ### h3 in list
+- #### h4 in list
+- ##### h5 in list
+- ###### h6 in list
+
+# h1 outside nested blocks
+## h2 outside nested blocks
+`;
+    const tokens = md.parse(source, {});
+    const expected: MarkdownItHeader[] = [
+      {
+        level: 1,
+        title: 'h1 outside nested blocks',
+        slug: 'h1-outside-nested-blocks',
+        link: '#h1-outside-nested-blocks',
+        children: [
+          {
+            level: 2,
+            title: 'h2 outside nested blocks',
+            slug: 'h2-outside-nested-blocks',
+            link: '#h2-outside-nested-blocks',
+            children: [],
+          },
+        ],
+      },
+    ];
+
+    expect(
+      resolveHeadersFromTokens(tokens, {
+        level: [1, 2, 3, 4],
+        slugify,
+        shouldAllowHtml: false,
+        shouldEscapeText: false,
+      }),
+    ).toEqual(expected);
+  });
+});