diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..6fcf285
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,17 @@
+# Change Log
+
+All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+
+<a name="2.2.0"></a>
+# [2.2.0](https://github.com/imgix/imgix-php/compare/2.1.1...2.2.0) (2019-04-08)
+
+
+### Features
+
+*  add support for multiple URL parameter values by flattening nested arrays passed into $params ([#40](https://github.com/imgix/imgix-php/pull/40))
+
+
+### Bug Fixes
+
+*  replace deprecated phpunit annotations with exception methods ([#39](https://github.com/imgix/imgix-php/pull/39))
+*  add domain validation at UrlBuilder initialization ([#41](https://github.com/imgix/imgix-php/pull/41)), fixes [#10](https://github.com/imgix/imgix-php/issues/10)
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 87f1ae4..2275e43 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
   "name": "imgix/imgix-php",
   "description": "A PHP client library for generating URLs with imgix.",
   "type": "library",
-  "version": "2.1.1",
+  "version": "2.2.0",
   "license": "BSD-2-Clause",
   "keywords": [
     "imgix"
diff --git a/src/Imgix/UrlBuilder.php b/src/Imgix/UrlBuilder.php
index d8d3f27..74a7387 100644
--- a/src/Imgix/UrlBuilder.php
+++ b/src/Imgix/UrlBuilder.php
@@ -4,7 +4,7 @@
 
 class UrlBuilder {
 
-    private $currentVersion = "2.1.1";
+    private $currentVersion = "2.2.0";
     private $domains;
     private $useHttps;
     private $signKey;