diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02067934..0726669f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 4.5.2
+* Added a new user property `AppSetId` - a unique user identifier for all the developer's applications. May be used for some integrations.
+
 ## 4.5.1
 * Fixed `Could not find offeringId value` error for `purchaseProduct` call on iOS.
 
diff --git a/android/build.gradle b/android/build.gradle
index fb9bdcf3..5efb7288 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -41,6 +41,6 @@ android {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation 'io.qonversion.sandwich:sandwich:0.1.1'
+    implementation 'io.qonversion.sandwich:sandwich:0.1.2'
     implementation 'com.google.code.gson:gson:2.8.6'
 }
diff --git a/ios/qonversion_flutter.podspec b/ios/qonversion_flutter.podspec
index 9b41d4d1..966bdc96 100644
--- a/ios/qonversion_flutter.podspec
+++ b/ios/qonversion_flutter.podspec
@@ -16,7 +16,7 @@ Pod::Spec.new do |s|
   s.source_files = 'Classes/**/*'
   s.dependency 'Flutter'
   s.platform = :ios, '9.0'
-  s.dependency 'QonversionSandwich', '0.1.1'
+  s.dependency 'QonversionSandwich', '0.1.2'
 
   # Flutter.framework does not contain a i386 slice. Only x86_64 simulators are supported.
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'VALID_ARCHS[sdk=iphonesimulator*]' => 'x86_64' }
diff --git a/lib/src/models/user_property.dart b/lib/src/models/user_property.dart
index 68ef05ef..7ced3db5 100644
--- a/lib/src/models/user_property.dart
+++ b/lib/src/models/user_property.dart
@@ -6,4 +6,5 @@ enum QUserProperty {
   kochavaDeviceId,
   customUserId,
   firebaseAppInstanceId,
+  appSetId, // Android only
 }
diff --git a/lib/src/qonversion.dart b/lib/src/qonversion.dart
index 5b15469d..ae2b9059 100644
--- a/lib/src/qonversion.dart
+++ b/lib/src/qonversion.dart
@@ -17,7 +17,7 @@ import 'models/purchase_exception.dart';
 import 'qa_provider.dart';
 
 class Qonversion {
-  static const String _sdkVersion = "4.5.1";
+  static const String _sdkVersion = "4.5.2";
 
   static const MethodChannel _channel = MethodChannel('qonversion_flutter_sdk');
 
diff --git a/macos/qonversion_flutter.podspec b/macos/qonversion_flutter.podspec
index e7a12c7d..bb930684 100644
--- a/macos/qonversion_flutter.podspec
+++ b/macos/qonversion_flutter.podspec
@@ -16,7 +16,7 @@ Pod::Spec.new do |s|
   s.source_files = 'Classes/**/*'
   s.dependency 'FlutterMacOS'
   s.platform = :osx, '10.12'
-  s.dependency 'QonversionSandwich', '0.1.1'
+  s.dependency 'QonversionSandwich', '0.1.2'
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES' }
   s.swift_version = '5.0'
   s.static_framework = true
diff --git a/pubspec.yaml b/pubspec.yaml
index 2b06d8df..78eabd71 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: qonversion_flutter
 description: Flutter plugin to implement in-app subscriptions and purchases. Validate user receipts and manage cross-platform access to paid content on your app. Android & iOS.
-version: 4.5.1
+version: 4.5.2
 homepage: 'https://qonversion.io'
 repository: 'https://github.com/qonversion/flutter-sdk'