diff --git a/package.json b/package.json
index 823ddbc..7f1c27c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "private": true,
-  "version": "0.0.0",
+  "version": "1.0.0",
   "description": "extensible abstract syntax tree",
   "license": "cc-by-4.0",
   "keywords": [],
diff --git a/readme.md b/readme.md
index a850e97..ccaab9e 100644
--- a/readme.md
+++ b/readme.md
@@ -10,7 +10,7 @@ It implements the **[unist][]** spec.
 
 This document may not be released.
 See [releases][] for released documents.
-The latest released version is [`0.0.0`][latest].
+The latest released version is [`1.0.0`][latest].
 
 ## Table of Contents
 
@@ -454,7 +454,7 @@ The initial release of this project was authored by **[@wooorm][author]**.
 
 [releases]: https://github.com/syntax-tree/xast/releases
 
-[latest]: https://github.com/syntax-tree/xast/releases/tag/0.0.0
+[latest]: https://github.com/syntax-tree/xast/releases/tag/1.0.0
 
 [dfn-unist-node]: https://github.com/syntax-tree/unist#node