diff --git a/index.js b/index.js
index fbb6bdf..cc44896 100644
--- a/index.js
+++ b/index.js
@@ -29,7 +29,8 @@ export default function remarkFrontmatter(options = 'yaml') {
   function add(field, value) {
     const list = /** @type {unknown[]} */ (
       // Other extensions
-      /* c8 ignore next 2 */
+      /* c8 ignore next 3 */
+      // @ts-expect-error: to do: remove when remark is released.
       data[field] ? data[field] : (data[field] = [])
     )
 
diff --git a/package.json b/package.json
index 86d39e1..aacea88 100644
--- a/package.json
+++ b/package.json
@@ -35,10 +35,10 @@
     "index.js"
   ],
   "dependencies": {
-    "@types/mdast": "^3.0.0",
-    "mdast-util-frontmatter": "^1.0.0",
-    "micromark-extension-frontmatter": "^1.0.0",
-    "unified": "^10.0.0"
+    "@types/mdast": "^4.0.0",
+    "mdast-util-frontmatter": "^2.0.0",
+    "micromark-extension-frontmatter": "^2.0.0",
+    "unified": "^11.0.0"
   },
   "devDependencies": {
     "@types/tape": "^5.0.0",
@@ -50,9 +50,10 @@
     "remark-preset-wooorm": "^9.0.0",
     "rimraf": "^3.0.0",
     "tape": "^5.0.0",
-    "to-vfile": "^7.0.0",
+    "to-vfile": "^8.0.0",
     "type-coverage": "^2.0.0",
     "typescript": "^5.0.0",
+    "vfile": "^6.0.0",
     "xo": "^0.56.0"
   },
   "scripts": {
diff --git a/test/index.js b/test/index.js
index d03fa8d..f55acd8 100644
--- a/test/index.js
+++ b/test/index.js
@@ -15,6 +15,7 @@ import remarkFrontmatter from '../index.js'
 
 test('remarkFrontmatter', (t) => {
   t.doesNotThrow(() => {
+    // @ts-expect-error: remove when remark is released.
     remark().use(remarkFrontmatter).freeze()
   }, 'should not throw if not passed options')
 
@@ -91,7 +92,10 @@ test('fixtures', (t) => {
         )
       } catch {}
 
+      // @ts-expect-error: remove when remark is released.
       const proc = remark().use(remarkFrontmatter, config)
+      /** @type {Root} */
+      // @ts-expect-error: remove when remark is released.
       const actual = proc.parse(input)
 
       try {
@@ -112,6 +116,7 @@ test('fixtures', (t) => {
       }
 
       st.deepEqual(actual, expected, 'tree')
+      // @ts-expect-error: remove when remark is released.
       st.equal(String(proc.processSync(input)), String(output), 'process')
       st.end()
     })