diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6002748..184ed9b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## v4.6.6 (Apr 12, 2023)
+
+### Improvements
+- Changed default value of nextResultSize and prevResultSize in MessageCollection to 40
+- Stability improvements
+
 ## v4.6.5 (Apr 10, 2023)
 
 - Fixed a bug where a group channel collection returns channels for other user who used the device
diff --git a/Package.swift b/Package.swift
index c8aa972..e3fd3e7 100644
--- a/Package.swift
+++ b/Package.swift
@@ -15,8 +15,8 @@ let package = Package(
     targets: [
         .binaryTarget(
             name: "SendbirdChatSDK",
-            url: "https://github.com/sendbird/sendbird-chat-sdk-ios/releases/download/v4.6.5/SendbirdChatSDK.xcframework.zip",
-            checksum: "4bd1377e0f4870168ab004bd258a31c12300c14ba7adef4a7ea0414b27aed3df"
+            url: "https://github.com/sendbird/sendbird-chat-sdk-ios/releases/download/v4.6.6/SendbirdChatSDK.xcframework.zip",
+            checksum: "83bc147f7a19aa9028eed663e7d13b511611f06ed6c62e0c4872df7536ade2c2"
         ),
     ]
 )
diff --git a/SendbirdChatSDK.podspec b/SendbirdChatSDK.podspec
index 0a06148..33ad661 100644
--- a/SendbirdChatSDK.podspec
+++ b/SendbirdChatSDK.podspec
@@ -1,7 +1,7 @@
 
 Pod::Spec.new do |s|
   s.name         = 'SendbirdChatSDK'
-  s.version      = "4.6.5"
+  s.version      = "4.6.6"
   s.summary      = 'Sendbird Chat iOS Framework'
   s.description  = 'Messaging and Chat API for Mobile Apps and Websites'
   s.homepage     = 'https://sendbird.com'
@@ -13,7 +13,7 @@ Pod::Spec.new do |s|
     'Celine Moon' => 'celine.moon@sendbird.com',
     'Ernest Hong' => 'ernest.hong@sendbird.com'
   }
-  s.source       = { :http => "https://github.com/sendbird/sendbird-chat-sdk-ios/releases/download/v4.6.5/SendbirdChatSDK.zip", :sha1 => "eb3f12a47f0d2dd7862e54fbbfdc07f7113c1a17" }
+  s.source       = { :http => "https://github.com/sendbird/sendbird-chat-sdk-ios/releases/download/v4.6.6/SendbirdChatSDK.zip", :sha1 => "41ede01de59260a6ef5f410f7cbb74e931d432d9" }
   s.requires_arc = true
   s.platform = :ios, '9.0'
   s.documentation_url = 'https://sendbird.com/docs/chat'