diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..1b269537
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,10 @@
+# v1.0.0 (2020-10-13)
+
+## ✨ New features
+
+- [`27d693d`](https://github.com/upptime/uptime-monitor/commit/27d693d)  Migrate action helper functions
+- [`85af6b0`](https://github.com/upptime/uptime-monitor/commit/85af6b0)  Release v1 of action
+
+## 🐛 Bug fixes
+
+- [`1a302b1`](https://github.com/upptime/uptime-monitor/commit/1a302b1)  Change ?. to || ""
diff --git a/package-lock.json b/package-lock.json
index 56b686e0..1fe366c8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@upptime/uptime-monitor",
-  "version": "0.0.0",
+  "version": "1.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index fd1cc764..83b4a9d0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@upptime/uptime-monitor",
-  "version": "0.0.0",
+  "version": "1.0.0",
   "description": "Uptime monitor powered by GitHub Actions",
   "main": "dist/index.js",
   "scripts": {