diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19b5c20..69198bf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file.
 
-## [3.1.0] 2024-08-14
+## [4.0.0] 2024-08-14
 
 - **New Features**
   - [CLIENT-2177] Add support for `MapReturnType#MAP_ORDERED` and `MapReturnType#MAP_UNORDERED`.
diff --git a/lib/aerospike/version.rb b/lib/aerospike/version.rb
index e135e52..fe40035 100644
--- a/lib/aerospike/version.rb
+++ b/lib/aerospike/version.rb
@@ -1,4 +1,4 @@
 # encoding: utf-8
 module Aerospike
-  VERSION = "3.0.0"
+  VERSION = "4.0.0"
 end