diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
index aef6fcc..75a270e 100644
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,7 @@
+## Customerio 5.3.0 - December 8, 2023
+### Added
+- The `identify_customer_id` method has been added. This allows the customer ID to be specified separately from the attributes. This allows a person to be updated by identifying them by e.g.: their email address. Thanks to trwalzer, jrbeck and jeremyw for these changes.
+
 ## Customerio 5.2.0 - December 8, 2023
 ### Changed
 - The `identify` method will now automatically use the `cio_id` attribute as the customer ID when calling the track service. This allows a customer to be updated using `identify` to modify the `id` and `email` attributes.
diff --git a/lib/customerio/version.rb b/lib/customerio/version.rb
index 82b8bbb..ec93c97 100644
--- a/lib/customerio/version.rb
+++ b/lib/customerio/version.rb
@@ -1,3 +1,3 @@
 module Customerio
-  VERSION = "5.2.0"
+  VERSION = "5.3.0"
 end