diff --git a/MYOB.API.SDK/SDK.Test/Communication/ApiRequestHandlerTests.cs b/MYOB.API.SDK/SDK.Test/Communication/ApiRequestHandlerTests.cs
index dee0afdb..e630c5c4 100644
--- a/MYOB.API.SDK/SDK.Test/Communication/ApiRequestHandlerTests.cs
+++ b/MYOB.API.SDK/SDK.Test/Communication/ApiRequestHandlerTests.cs
@@ -131,7 +131,6 @@ private static void AssertStandardHeaders(bool supplyCredentials, bool supplyOAu
         
             Assert.IsTrue(request.Headers[HttpRequestHeader.AcceptEncoding].Split(new[] {','}).Contains("gzip"));
 
-            Assert.AreEqual("<<clientid>>", request.Headers["x-myobapi-key"]);
             Assert.AreEqual("v2", request.Headers["x-myobapi-version"]);
 
             if (supplyCredentials)
@@ -173,7 +172,6 @@ private static void AssertEmptyCredentialsHeaders(bool supplyOAuth, WebRequest r
 
             Assert.IsTrue(request.Headers[HttpRequestHeader.AcceptEncoding].Split(new[] { ',' }).Contains("gzip"));
 
-            Assert.AreEqual("<<clientid>>", request.Headers["x-myobapi-key"]);
             Assert.AreEqual("v2", request.Headers["x-myobapi-version"]);
             Assert.IsNull(request.Headers["x-myobapi-cftoken"]);
         }
diff --git a/MYOB.API.SDK/SDK/ApiConfiguration.cs b/MYOB.API.SDK/SDK/ApiConfiguration.cs
index f1f99971..fa3f015f 100644
--- a/MYOB.API.SDK/SDK/ApiConfiguration.cs
+++ b/MYOB.API.SDK/SDK/ApiConfiguration.cs
@@ -80,6 +80,11 @@ public ApiConfiguration(string apiBaseUrl) : this(null, null, null, apiBaseUrl)
         /// </summary>
         public bool GenerateUris { get; private set; }
 
+        /// <summary>
+        /// The Api key used for making api request
+        /// </summary>
+        public string AuthApiKey { get; private set; }
+
 #if !PORTABLE
         /// <summary>
         /// Gets or sets the cache policy for all requests
diff --git a/MYOB.API.SDK/SDK/Communication/ApiRequestHelper.cs b/MYOB.API.SDK/SDK/Communication/ApiRequestHelper.cs
index e761c73e..a1f368d1 100644
--- a/MYOB.API.SDK/SDK/Communication/ApiRequestHelper.cs
+++ b/MYOB.API.SDK/SDK/Communication/ApiRequestHelper.cs
@@ -121,7 +121,7 @@ public void SetStandardHeaders(WebRequest request, IApiConfiguration configurati
 #endif
                 });
 
-            request.Headers["x-myobapi-key"] = configuration.ClientId;
+            request.Headers["x-myobapi-key"] = configuration.AuthApiKey;
             request.Headers["x-myobapi-version"] = "v2";
 
             if ((credentials != null) && (!String.IsNullOrEmpty(credentials.Username))) // password can be empty
diff --git a/MYOB.API.SDK/SDK/Contracts/Version2/Sale/Invoice.cs b/MYOB.API.SDK/SDK/Contracts/Version2/Sale/Invoice.cs
index 36a6b1e7..bbad972a 100644
--- a/MYOB.API.SDK/SDK/Contracts/Version2/Sale/Invoice.cs
+++ b/MYOB.API.SDK/SDK/Contracts/Version2/Sale/Invoice.cs
@@ -165,6 +165,11 @@ public Invoice()
         /// If true, surcharge fee could apply to invoice 
         /// </summary>
         public bool CanApplySurcharge { get; set; }
+        
+        /// <summary>
+        /// If true or null, BPay could apply to invoice when OIP enabled  
+        /// </summary>
+        public bool? CanApplyBPay { get; set; }
 
     }
 }
diff --git a/MYOB.API.SDK/SDK/IApiConfiguration.cs b/MYOB.API.SDK/SDK/IApiConfiguration.cs
index fb41e7bd..6840c7af 100644
--- a/MYOB.API.SDK/SDK/IApiConfiguration.cs
+++ b/MYOB.API.SDK/SDK/IApiConfiguration.cs
@@ -30,6 +30,11 @@ public interface IApiConfiguration
         /// </summary>
         string ApiBaseUrl { get; }
 
+        /// <summary>
+        /// The Api key used for making api request
+        /// </summary>
+        string AuthApiKey { get; }
+
 #if !PORTABLE
         /// <summary>
         /// Gets or sets the cache policy for all requests
diff --git a/README.md b/README.md
index bc2cbe26..172248bd 100644
--- a/README.md
+++ b/README.md
@@ -8,8 +8,6 @@
 
 #AccountRight Live API .Net SDK#
 
-[![Join the chat at https://gitter.im/MYOB-Technology/AccountRight_Live_API_.Net_SDK](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/MYOB-Technology/AccountRight_Live_API_.Net_SDK?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-
 This is the source repository for the MYOB AccountRight Live .Net SDK.
 
 The official release of the SDK can be found on [NUGET](http://www.nuget.org/packages/MYOB.AccountRight.API.SDK/) and can be installed from Visual Studio using the Package Manager console.
diff --git a/appveyor.yml b/appveyor.yml
index 39a4f41e..6ba48a10 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 2024.4.{build}
+version: 2024.5.{build}
 shallow_clone: true
 assembly_info:
   patch: true
@@ -23,17 +23,25 @@ artifacts:
 - path: .\Artefacts\Coverage\output.xml
   name: Coverage
 deploy:
+- provider: NuGet
+  api_key:
+    secure: 93FcjymW95mjyg2lKI8vfBhuuPnAwVCuRBxbhc3QvvLnZorHRHM5K1tOe9AmoZRz
+  skip_symbols: true
+  artifact: Release
+  on:
+    branch: release
+- provider: NuGet
+  api_key:
+    secure: 93FcjymW95mjyg2lKI8vfBhuuPnAwVCuRBxbhc3QvvLnZorHRHM5K1tOe9AmoZRz
+  skip_symbols: true
+  artifact: Candidate
+  on:
+    branch: candidate
 - provider: NuGet
   server: https://www.myget.org/F/myob-developers/api/v2
   api_key:
     secure: OGw616WsfGBUWoVi1NZFVekoCyXoqi1f93v8GJJ8Y1DgcH5utdKg0yX2FGkFkXfj
   artifact: Release
-notifications:
-- provider: Webhook
-  url: https://webhooks.gitter.im/e/a5f4ffd724543d128fff
-  on_build_success: true
-  on_build_failure: true
-  on_build_status_changed: true
 on_success:
 - cmd: >-
     .\packages\coveralls.io.1.3.4\tools\coveralls.net.exe --opencover .\Artefacts\Coverage\output.xml
\ No newline at end of file