diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..3b3041e
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,8 @@
+# Changelog
+
+## 1.0.0 (2023-03-22)
+
+
+### Features
+
+* Implement CLI ([c686ab1](https://www.github.com/humanwhocodes/toot/commit/c686ab19dcde0e2936e2533589fdc894fcfc2720))
diff --git a/package-lock.json b/package-lock.json
index 621fae4..fb31b22 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@humanwhocodes/toot",
-  "version": "0.0.0",
+  "version": "1.0.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@humanwhocodes/toot",
-      "version": "0.0.0",
+      "version": "1.0.0",
       "license": "Apache-2.0",
       "dependencies": {
         "@humanwhocodes/env": "^2.2.2",
diff --git a/package.json b/package.json
index f03b9a7..5db9ed8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@humanwhocodes/toot",
-  "version": "0.0.0",
+  "version": "1.0.0",
   "description": "CLI for posting to Mastodon",
   "type": "module",
   "bin": {