diff --git a/BTCPayServer.Client/App/IBTCPayAppHubClient.cs b/BTCPayServer.Client/App/IBTCPayAppHubClient.cs
index 78e0c17a8..05f7090dc 100644
--- a/BTCPayServer.Client/App/IBTCPayAppHubClient.cs
+++ b/BTCPayServer.Client/App/IBTCPayAppHubClient.cs
@@ -44,7 +44,7 @@ public interface IBTCPayAppHubServer
     Task<string> DeriveScript(string identifier);
     Task TrackScripts(string identifier, string[] scripts);
     Task<string> UpdatePsbt(string[] identifiers, string psbt);
-    Task<CoinResponse[]> GetUTXOs(string[] identifiers);
+    Task<Dictionary<string, CoinResponse[]>> GetUTXOs(string[] identifiers);
     Task<Dictionary<string, TxResp[]>> GetTransactions(string[] identifiers);
     Task SendInvoiceUpdate(LightningInvoice lightningInvoice);
     Task<long?> GetCurrentMaster();
@@ -94,7 +94,6 @@ public class TransactionDetectedRequest
 
 public class CoinResponse
 {
-    public string? Identifier{ get; set; }
     public bool Confirmed { get; set; }
     public string? Script { get; set; }
     public string? Outpoint { get; set; }
diff --git a/BTCPayServer/BTCPayServer.csproj b/BTCPayServer/BTCPayServer.csproj
index 3f3f45b2f..9ac706557 100644
--- a/BTCPayServer/BTCPayServer.csproj
+++ b/BTCPayServer/BTCPayServer.csproj
@@ -81,6 +81,7 @@
     <PackageReference Condition="'$(RazorCompileOnBuild)' == 'false'" Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="8.0.11" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="8.0.11" />
     <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
+    <PackageReference Include="Microsoft.AspNetCore.SignalR.Protocols.NewtonsoftJson" Version="8.0.11" />
   </ItemGroup>
 
 	<ItemGroup>
diff --git a/BTCPayServer/Hosting/Startup.cs b/BTCPayServer/Hosting/Startup.cs
index 51b59a00d..58cc25637 100644
--- a/BTCPayServer/Hosting/Startup.cs
+++ b/BTCPayServer/Hosting/Startup.cs
@@ -115,7 +115,11 @@ namespace BTCPayServer.Hosting
             services.AddBTCPayServer(Configuration, Logs);
             services.AddProviderStorage();
             services.AddSession();
-            services.AddSignalR();
+            services.AddSignalR().AddNewtonsoftJsonProtocol(options =>
+            {
+                NBitcoin.JsonConverters.Serializer.RegisterFrontConverters(options.PayloadSerializerSettings);
+                options.PayloadSerializerSettings.Converters.Add(new BTCPayServer.Lightning.JsonConverters.LightMoneyJsonConverter());
+            });
             services.AddFido2(options =>
                 {
                     options.ServerName = "BTCPay Server";