diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72852656..bfe9d001 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,15 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [6.6.0-beta1]
+
+- This release includes initial support for Anonymous user activation, a feature that allows marketers to convert valuable visitors into customers. With this feature, the SDK can:
+  - Fetch anonymous profile creation criteria from your Iterable project, and then automatically create Iterable user profiles for anonymous users who meet these criteria.
+  - Save information about a user's previous interactions with your application to their anonymous profile, after it's created.
+  - Display personalized messages for anonymous users (in-app, push, and embedded messages).
+  - Merge anonymous profiles into an existing, known user profiles (when needed).
+- Anonymous user activation is currently in private beta. If you'd like to learn more about it or discuss using it, talk to your Iterable customer success manager (who can also provide detailed documentation).
+
 ## [6.5.7]
 ### Fixed
 - Fixed deeplink re-routing issue where delegate would only return `false` value. Thanks to @scottasoutherland :) 
diff --git a/Iterable-iOS-AppExtensions.podspec b/Iterable-iOS-AppExtensions.podspec
index 0db2bf3f..0c49051f 100644
--- a/Iterable-iOS-AppExtensions.podspec
+++ b/Iterable-iOS-AppExtensions.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
   s.name         = "Iterable-iOS-AppExtensions"
   s.module_name  = "IterableAppExtensions"
-  s.version      = "6.5.7"
+  s.version      = "6.6.0-beta1"
   s.summary      = "App Extensions for Iterable SDK"
 
   s.description  = <<-DESC
diff --git a/Iterable-iOS-SDK.podspec b/Iterable-iOS-SDK.podspec
index fa5413a5..cca6a821 100644
--- a/Iterable-iOS-SDK.podspec
+++ b/Iterable-iOS-SDK.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
   s.name         = "Iterable-iOS-SDK"
   s.module_name  = "IterableSDK"
-  s.version      = "6.5.7"
+  s.version      = "6.6.0-beta1"
   s.summary      = "Iterable's official SDK for iOS"
 
   s.description  = <<-DESC
diff --git a/swift-sdk/IterableAPI.swift b/swift-sdk/IterableAPI.swift
index df98fc00..9bcd428b 100644
--- a/swift-sdk/IterableAPI.swift
+++ b/swift-sdk/IterableAPI.swift
@@ -7,7 +7,7 @@ import UIKit
 
 @objcMembers public final class IterableAPI: NSObject {
     /// The current SDK version
-    public static let sdkVersion = "6.5.7"
+    public static let sdkVersion = "6.6.0-beta1"
     
     /// The email of the logged in user that this IterableAPI is using
     public static var email: String? {