diff --git a/OneSignalSDK.DotNet.Android.Core.Binding/OneSignalSDK.DotNet.Android.Core.Binding.csproj b/OneSignalSDK.DotNet.Android.Core.Binding/OneSignalSDK.DotNet.Android.Core.Binding.csproj
index 3956828..4a8ac8e 100644
--- a/OneSignalSDK.DotNet.Android.Core.Binding/OneSignalSDK.DotNet.Android.Core.Binding.csproj
+++ b/OneSignalSDK.DotNet.Android.Core.Binding/OneSignalSDK.DotNet.Android.Core.Binding.csproj
@@ -55,6 +55,7 @@
     <LibraryProjectZip Include="Jars\core-release.aar" />
   </ItemGroup>
   <ItemGroup>
+    <PackageReference Include="Xamarin.AndroidX.Core" Version="1.12.0.4" />
     <PackageReference Include="Xamarin.Kotlin.StdLib.Jdk8" Version="1.8.0.1" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/OneSignalSDK.DotNet.Android.Notifications.Binding/Additions/NotificationExtenderBase.cs b/OneSignalSDK.DotNet.Android.Notifications.Binding/Additions/NotificationExtenderBase.cs
new file mode 100644
index 0000000..474999a
--- /dev/null
+++ b/OneSignalSDK.DotNet.Android.Notifications.Binding/Additions/NotificationExtenderBase.cs
@@ -0,0 +1,9 @@
+using AndroidX.Core.App;
+
+namespace Com.OneSignal.Notifications.Android
+{
+    public abstract class NotificationExtenderBase : Java.Lang.Object, NotificationCompat.IExtender
+    {
+        public abstract NotificationCompat.Builder Extend(NotificationCompat.Builder builder);
+    }
+}
diff --git a/OneSignalSDK.DotNet.Android.Notifications.Binding/Additions/NotificationServiceExtenderBase.cs b/OneSignalSDK.DotNet.Android.Notifications.Binding/Additions/NotificationServiceExtenderBase.cs
new file mode 100644
index 0000000..148eccc
--- /dev/null
+++ b/OneSignalSDK.DotNet.Android.Notifications.Binding/Additions/NotificationServiceExtenderBase.cs
@@ -0,0 +1,10 @@
+using Android.Content;
+
+namespace Com.OneSignal.Android.Notifications
+{
+    public abstract class NotificationServiceExtenderBase: Java.Lang.Object, Com.OneSignal.Android.Notifications.INotificationServiceExtension
+    {
+        public abstract void OnNotificationReceived(Com.OneSignal.Android.Notifications.INotificationReceivedEvent ev);
+    }
+}
+
diff --git a/OneSignalSDK.DotNet.Android.Notifications.Binding/OneSignalSDK.DotNet.Android.Notifications.Binding.csproj b/OneSignalSDK.DotNet.Android.Notifications.Binding/OneSignalSDK.DotNet.Android.Notifications.Binding.csproj
index eea8ad5..3a29116 100644
--- a/OneSignalSDK.DotNet.Android.Notifications.Binding/OneSignalSDK.DotNet.Android.Notifications.Binding.csproj
+++ b/OneSignalSDK.DotNet.Android.Notifications.Binding/OneSignalSDK.DotNet.Android.Notifications.Binding.csproj
@@ -55,6 +55,10 @@
     <LibraryProjectZip Include="Jars\notifications-release.aar" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\OneSignalSDK.DotNet.Android.Core.Binding\OneSignalSDK.DotNet.Android.Core.Binding.csproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.AndroidX.Core" Version="1.12.0.4" />
     <PackageReference Include="Xamarin.Kotlin.StdLib.Jdk8" Version="1.8.0.1" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/OneSignalSDK.DotNet.Android.Notifications.Binding/Transforms/Metadata.xml b/OneSignalSDK.DotNet.Android.Notifications.Binding/Transforms/Metadata.xml
index 5676935..74d6a5b 100644
--- a/OneSignalSDK.DotNet.Android.Notifications.Binding/Transforms/Metadata.xml
+++ b/OneSignalSDK.DotNet.Android.Notifications.Binding/Transforms/Metadata.xml
@@ -1,3 +1,5 @@
 <metadata>
-	<attr path="/api/package[@name='com.onesignal.notifications']" name="managedName">Com.OneSignal.Android.Notifications</attr>
+  <attr path="/api/package[@name='com.onesignal.notifications']" name="managedName">Com.OneSignal.Android.Notifications</attr>
+
+  <attr path="/api/package[@name='com.onesignal.notifications.internal']/class[@name='Notification']/method[@name='getGroupedNotifications' and count(parameter)=0]" name="return">java.util.List&lt;com.onesignal.notifications.INotification&gt;</attr>
 </metadata>
diff --git a/OneSignalSDK.DotNet.Android/OneSignalSDK.DotNet.Android.csproj b/OneSignalSDK.DotNet.Android/OneSignalSDK.DotNet.Android.csproj
index b246e89..fc7c76a 100644
--- a/OneSignalSDK.DotNet.Android/OneSignalSDK.DotNet.Android.csproj
+++ b/OneSignalSDK.DotNet.Android/OneSignalSDK.DotNet.Android.csproj
@@ -54,8 +54,8 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Xamarin.Kotlin.StdLib.Jdk8" Version="1.8.0.1" />
-    <PackageReference Include="Xamarin.KotlinX.Coroutines.Core" Version="1.6.4.2" />
-    <PackageReference Include="Xamarin.KotlinX.Coroutines.Android" Version="1.6.4.2" />
+    <PackageReference Include="Xamarin.KotlinX.Coroutines.Core" Version="1.8.0.1" />
+    <PackageReference Include="Xamarin.KotlinX.Coroutines.Android" Version="1.8.0.1" />
     <PackageReference Include="Xamarin.AndroidX.CardView" Version="1.0.0.16" />
     <PackageReference Include="Xamarin.AndroidX.Legacy.Support.V4" Version="1.0.0.14" />
     <PackageReference Include="Xamarin.AndroidX.Browser" Version="1.4.0.2" />
@@ -66,5 +66,9 @@
     <PackageReference Include="Xamarin.Google.Dagger" Version="2.41.0.2" />
     <PackageReference Include="Xamarin.GooglePlayServices.Base" Version="118.1.0" />
     <PackageReference Include="Xamarin.AndroidX.Work.Work.Runtime.Ktx" Version="2.7.1.5" />
+    <PackageReference Include="Xamarin.AndroidX.Collection" Version="1.4.0.1" />
+    <PackageReference Include="Xamarin.AndroidX.Collection.Ktx" Version="1.4.0.1" />
+    <PackageReference Include="Xamarin.AndroidX.Activity" Version="1.7.2" />
+    <PackageReference Include="Xamarin.AndroidX.Activity.Ktx" Version="1.7.2" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/OneSignalSDK.DotNet.Android/Utilities/NotificationExtensionAttribute.cs b/OneSignalSDK.DotNet.Android/Utilities/NotificationExtensionAttribute.cs
new file mode 100644
index 0000000..796d05c
--- /dev/null
+++ b/OneSignalSDK.DotNet.Android/Utilities/NotificationExtensionAttribute.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Diagnostics;
+using Android.App;
+using Android.Content;
+
+namespace Com.OneSignal.Android
+{
+    [Serializable]
+    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
+    public sealed class NotificationExtensionAttribute : Attribute, Java.Interop.IJniNameProviderAttribute
+    {
+        public string Name { get; set; }
+        public NotificationExtensionAttribute()
+        {
+        }
+    }
+}
diff --git a/OneSignalSDK.DotNet.nuspec b/OneSignalSDK.DotNet.nuspec
index 38f51f9..15df08c 100644
--- a/OneSignalSDK.DotNet.nuspec
+++ b/OneSignalSDK.DotNet.nuspec
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
     <metadata>
-        <version>5.1.3</version>
+        <version>5.1.3.1-alpha.1</version>
         <id>OneSignalSDK.DotNet</id>
         <title>OneSignal SDK for .Net6+ and Xamarin</title>
         <authors>OneSignal</authors>
diff --git a/OneSignalSDK.DotNet/OneSignalSDK.DotNet.csproj b/OneSignalSDK.DotNet/OneSignalSDK.DotNet.csproj
index 72dc752..2154237 100644
--- a/OneSignalSDK.DotNet/OneSignalSDK.DotNet.csproj
+++ b/OneSignalSDK.DotNet/OneSignalSDK.DotNet.csproj
@@ -1,9 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net7.0;net7.0-android;net7.0-ios</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net7.0;net7.0-android;net7.0-ios</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <LangVersion>10.0</LangVersion>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\OneSignalSDK.DotNet.Core\OneSignalSDK.DotNet.Core.csproj" />