diff --git a/CHANGELOG.md b/CHANGELOG.md
index 851cf8f4..ebed9dd9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,9 @@
-### Unreleased
-* Add `metadata` field in the Event model to support new Event metadata feature #300
-* Add support for filtering `metadata` using `metadata_key`, `metadata_value`, and `metadata_pair` #300
+### 5.1.0 / 2021-06-07
+* Add support for read only attributes #298
 * Add `save_all_attributes` and `update_all_attributes` methods to support
   nullifying attributes. #299
+* Add support new `Event` metadata feature #300  
+* Fix attributes assignment for `Delta` #297  
 * Fix issue where files couldn't be attached to drafts #302
 * Fix exception raise when content-type is not JSON #303
 * Fix issue where draft version wouldn't update after `update` or `save` #304
diff --git a/lib/nylas/version.rb b/lib/nylas/version.rb
index d6299010..a1540f93 100644
--- a/lib/nylas/version.rb
+++ b/lib/nylas/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Nylas
-  VERSION = "4.6.5"
+  VERSION = "5.1.0"
 end