diff --git a/index.js b/index.js
index 2a1fbcaf2..782cc65e2 100644
--- a/index.js
+++ b/index.js
@@ -136,7 +136,7 @@ export function plain(text, opts = {}, components = {}) {
       Fragment: React.Fragment,
       components,
     })
-    .processSync(text).contents;
+    .processSync(text).result;
 }
 
 /**
diff --git a/package-lock.json b/package-lock.json
index 2ff55ea93..95f3e9c81 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,7 @@
         "remark-rehype": "^7.0.0",
         "remark-slug": "^6.0.0",
         "remark-stringify": "^8.0.0",
-        "unified": "^8.4.0",
+        "unified": "^9.2.1",
         "unist-util-flatmap": "^1.0.0",
         "unist-util-map": "^2.0.0",
         "unist-util-select": "^3.0.4"
@@ -31675,15 +31675,20 @@
       }
     },
     "node_modules/unified": {
-      "version": "8.4.2",
-      "resolved": "https://registry.npmjs.org/unified/-/unified-8.4.2.tgz",
-      "integrity": "sha512-JCrmN13jI4+h9UAyKEoGcDZV+i1E7BLFuG7OsaDvTXI5P0qhHX+vZO/kOhz9jn8HGENDKbwSeB0nVOg4gVStGA==",
+      "version": "9.2.1",
+      "resolved": "https://registry.npmjs.org/unified/-/unified-9.2.1.tgz",
+      "integrity": "sha512-juWjuI8Z4xFg8pJbnEZ41b5xjGUWGHqXALmBZ3FC3WX0PIx1CZBIIJ6mXbYMcf6Yw4Fi0rFUTA1cdz/BglbOhA==",
       "dependencies": {
         "bail": "^1.0.0",
         "extend": "^3.0.0",
+        "is-buffer": "^2.0.0",
         "is-plain-obj": "^2.0.0",
         "trough": "^1.0.0",
         "vfile": "^4.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/unified"
       }
     },
     "node_modules/union-value": {
@@ -60649,12 +60654,13 @@
       "dev": true
     },
     "unified": {
-      "version": "8.4.2",
-      "resolved": "https://registry.npmjs.org/unified/-/unified-8.4.2.tgz",
-      "integrity": "sha512-JCrmN13jI4+h9UAyKEoGcDZV+i1E7BLFuG7OsaDvTXI5P0qhHX+vZO/kOhz9jn8HGENDKbwSeB0nVOg4gVStGA==",
+      "version": "9.2.1",
+      "resolved": "https://registry.npmjs.org/unified/-/unified-9.2.1.tgz",
+      "integrity": "sha512-juWjuI8Z4xFg8pJbnEZ41b5xjGUWGHqXALmBZ3FC3WX0PIx1CZBIIJ6mXbYMcf6Yw4Fi0rFUTA1cdz/BglbOhA==",
       "requires": {
         "bail": "^1.0.0",
         "extend": "^3.0.0",
+        "is-buffer": "^2.0.0",
         "is-plain-obj": "^2.0.0",
         "trough": "^1.0.0",
         "vfile": "^4.0.0"
diff --git a/package.json b/package.json
index 516ac07b6..053202cd3 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "remark-rehype": "^7.0.0",
     "remark-slug": "^6.0.0",
     "remark-stringify": "^8.0.0",
-    "unified": "^8.4.0",
+    "unified": "^9.2.1",
     "unist-util-flatmap": "^1.0.0",
     "unist-util-map": "^2.0.0",
     "unist-util-select": "^3.0.4"