diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b3e798..ab39f06 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ PHP Curl Class uses semantic versioning with version numbers written as `MAJOR.M
 `MINOR` and `PATCH` version changes. It is recommended to review `MAJOR` changes prior to upgrade as there may be
 backwards-incompatible changes that will affect existing usage.
 
+## 9.1.0 - 2021-03-24
+
+### Added
+
+- Support for using relative urls with MultiCurl::add\*() methods [#628](https://github.com/php-curl-class/php-curl-class/issues/628)
+
 ## 9.0.0 - 2021-03-19
 
 ### Changed
diff --git a/src/Curl/Curl.php b/src/Curl/Curl.php
index 77506b9..5bbb820 100644
--- a/src/Curl/Curl.php
+++ b/src/Curl/Curl.php
@@ -8,7 +8,7 @@ use Curl\Url;
 
 class Curl
 {
-    const VERSION = '9.0.0';
+    const VERSION = '9.1.0';
     const DEFAULT_TIMEOUT = 30;
 
     public $curl = null;