diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0958d25f..472d93b4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All notable changes to the LaunchDarkly Ruby SDK will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [6.3.3] - 2022-06-15
+### Fixed:
+- Improved efficiency of SSE parsing to reduce transient memory/CPU usage spikes when receiving flag/segment data for a large LaunchDarkly environment. (Thanks, [sq-square](https://github.com/launchdarkly/ruby-eventsource/pull/32)!)
+
 ## [6.3.2] - 2022-03-18
 ### Added:
 - Add `initial_reconnect_delay` option to config which controls the initial delay for reconnecting the streaming connection.
diff --git a/lib/ldclient-rb/version.rb b/lib/ldclient-rb/version.rb
index e4a48858..2701c782 100644
--- a/lib/ldclient-rb/version.rb
+++ b/lib/ldclient-rb/version.rb
@@ -1,3 +1,3 @@
 module LaunchDarkly
-  VERSION = "6.3.2"
+  VERSION = "6.3.3"
 end