diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..8a5a019
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,8 @@
+# Changelog
+
+## 1.0.0 (2021-08-13)
+
+
+### Bug Fixes
+
+* Improve logic ([21ab8d4](https://www.github.com/humanwhocodes/array-with-default/commit/21ab8d4069782608706c33d702fed8a80208e225))
diff --git a/package-lock.json b/package-lock.json
index cdf7b24..0e1e476 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@humanwhocodes/array-with-default",
-  "version": "0.0.0",
+  "version": "1.0.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@humanwhocodes/array-with-default",
-      "version": "0.0.0",
+      "version": "1.0.0",
       "license": "Apache-2.0",
       "devDependencies": {
         "chai": "^4.3.4",
diff --git a/package.json b/package.json
index 61fb92e..42056cb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@humanwhocodes/array-with-default",
-  "version": "0.0.0",
+  "version": "1.0.0",
   "description": "An array with default values for missing indices.",
   "type": "module",
   "main": "dist/array-with-default.cjs",