diff --git a/lib/index.js b/lib/index.js
index 7ce114d..4f322bb 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -125,7 +125,6 @@ export function raw(tree, file, options) {
     }
   }
 
-  // @ts-expect-error: update `vfile`.
   const result = fromParse5(documentMode(tree) ? document() : fragment(), file)
 
   if (stitches) {
@@ -506,5 +505,5 @@ function createParse5Location(node) {
  * @return {value is Options}
  */
 function isOptions(value) {
-  return Boolean(value && !('contents' in value))
+  return Boolean(value && !('message' in value && 'messages' in value))
 }
diff --git a/package.json b/package.json
index ccac43d..a41257f 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "parse5": "^6.0.0",
     "unist-util-position": "^4.0.0",
     "unist-util-visit": "^3.0.0",
-    "vfile": "^4.0.0",
+    "vfile": "^5.0.0",
     "web-namespaces": "^2.0.0",
     "zwitch": "^2.0.0"
   },
@@ -61,7 +61,7 @@
     "tape": "^5.0.0",
     "type-coverage": "^2.0.0",
     "typescript": "^4.0.0",
-    "unified": "^9.0.0",
+    "unified": "^10.0.0",
     "unist-builder": "^3.0.0",
     "xo": "^0.39.0"
   },
diff --git a/test.js b/test.js
index 714c930..3a61b36 100644
--- a/test.js
+++ b/test.js
@@ -1,7 +1,7 @@
 import test from 'tape'
 import {u} from 'unist-builder'
 import {h} from 'hastscript'
-import unified from 'unified'
+import {unified} from 'unified'
 import remarkParse from 'remark-parse'
 import remarkRehype from 'remark-rehype'
 import rehypeStringify from 'rehype-stringify'
@@ -288,10 +288,11 @@ test('integration', (t) => {
   unified()
     .use(remarkParse)
     .use(remarkRehype, {allowDangerousHtml: true})
-    .use(() => {
-      // @ts-expect-error hast is more specific than unist.
-      return (tree, file) => raw(tree, file)
-    })
+    .use(
+      () => (tree, file) =>
+        // @ts-expect-error hast is more specific than unist.
+        raw(tree, file)
+    )
     .use(() => {
       return transformer
       function transformer(/** @type {import('unist').Node} */ tree) {