diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..d282656
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,10 @@
+# vm-browserify Change Log
+All notable changes to this project will be documented in this file.
+This project adheres to [Semantic Versioning](http://semver.org/).
+
+## 1.0.0 - 2018-03-23
+
+(This is not a breaking change.)
+
+* Make the `sandbox` argument to `runInNewContext` optional, like in Node. (https://github.com/browserify/vm-browserify/pull/13)
+* Substituting `component-indexof` for deprecated `indexof`. (https://github.com/browserify/vm-browserify/pull/14)
diff --git a/package.json b/package.json
index 51cf431..751848d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vm-browserify",
-  "version": "0.0.4",
+  "version": "1.0.0",
   "description": "vm module for the browser",
   "main": "index.js",
   "repository": {