diff --git a/CHANGELOG.md b/CHANGELOG.md
index fa87354..330290e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## [1.5.0]
+* add support for `hmac_valid` which verifies a HMAC from a push notification using the client's secret.
+
 ## [1.4.0]
 * add support for `recurrence` key on upsertEvent (this is currently pre-release and not generally available yet)
 
@@ -85,6 +88,7 @@
 [1.2.0]: https://github.com/cronofy/cronofy-php/releases/tag/v1.2.0
 [1.3.0]: https://github.com/cronofy/cronofy-php/releases/tag/v1.3.0
 [1.4.0]: https://github.com/cronofy/cronofy-php/releases/tag/v1.4.0
+[1.5.0]: https://github.com/cronofy/cronofy-php/releases/tag/v1.5.0
 
 [#32]: https://github.com/cronofy/cronofy-php/pull/76
 [#33]: https://github.com/cronofy/cronofy-php/pull/74
diff --git a/composer.json b/composer.json
index dcd9158..a18287d 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
     "name": "cronofy/cronofy",
     "description": "PHP wrapper for Cronofy's unified calendar API",
-    "version": "v1.4.0",
+    "version": "v1.5.0",
     "require": {
         "php": ">=7.1"
     },