diff --git a/WalletConnectSharp.Auth/Controllers/AuthEngine.cs b/WalletConnectSharp.Auth/Controllers/AuthEngine.cs
index c4b206a..2fcdb53 100644
--- a/WalletConnectSharp.Auth/Controllers/AuthEngine.cs
+++ b/WalletConnectSharp.Auth/Controllers/AuthEngine.cs
@@ -73,7 +73,7 @@ public async Task<RequestUri> Request(RequestParams @params, string topic = null
     {
         IsInitialized();
 
-        @params.Type ??= new Cacao.CacaoHeader();
+        @params.Type ??= "eip4361";
 
         if (!IsValidRequest(@params))
         {
@@ -112,7 +112,7 @@ await this.Client.PairingTopics.Set(responseTopic,
         {
             Payload = new PayloadParams()
             {
-                Type = @params.Type ?? new Cacao.CacaoHeader(),
+                Type = @params.Type ?? "eip4361",
                 ChainId = @params.ChainId,
                 Statement = @params.Statement,
                 Aud = @params.Aud,
@@ -140,7 +140,7 @@ private async Task<RequestUri> RequestOnKnownPairing(string topic, RequestParams
             {
                 Payload = new PayloadParams()
                 {
-                    Type = @params.Type ?? new Cacao.CacaoHeader(),
+                    Type = @params.Type ?? "eip4361",
                     ChainId = @params.ChainId,
                     Statement = @params.Statement,
                     Aud = @params.Aud,
diff --git a/WalletConnectSharp.Auth/Internals/AuthEngineValidations.cs b/WalletConnectSharp.Auth/Internals/AuthEngineValidations.cs
index 93f7a07..9210c71 100644
--- a/WalletConnectSharp.Auth/Internals/AuthEngineValidations.cs
+++ b/WalletConnectSharp.Auth/Internals/AuthEngineValidations.cs
@@ -20,7 +20,7 @@ internal bool IsValidRequest(RequestParams @params)
         // const validChainId = isValidChainId(params.chainId);
         var domainInAud = @params.Aud.Contains(@params.Domain);
         var hasNonce = !string.IsNullOrWhiteSpace(@params.Nonce);
-        var hasValidType = @params.Type is { t: "eip4361" };
+        var hasValidType = @params.Type == "eip4361";
         var expiry = @params.Expiry;
         if (expiry != null && !Utils.IsValidRequestExpiry(expiry.Value, MinExpiry, MaxExpiry))
         {
diff --git a/WalletConnectSharp.Auth/Models/AuthPayload.cs b/WalletConnectSharp.Auth/Models/AuthPayload.cs
index 9ef7d26..96d1c07 100644
--- a/WalletConnectSharp.Auth/Models/AuthPayload.cs
+++ b/WalletConnectSharp.Auth/Models/AuthPayload.cs
@@ -5,7 +5,7 @@ namespace WalletConnectSharp.Auth.Models;
 public class AuthPayload
 {
     [JsonProperty("type", NullValueHandling = NullValueHandling.Ignore)]
-    public Cacao.CacaoHeader? Type { get; set; }
+    public string? Type { get; set; }
     
     [JsonProperty("chainId")]
     public string ChainId { get; set; }
diff --git a/WalletConnectSharp.Sign/Engine.cs b/WalletConnectSharp.Sign/Engine.cs
index 25b6a98..91dfb66 100644
--- a/WalletConnectSharp.Sign/Engine.cs
+++ b/WalletConnectSharp.Sign/Engine.cs
@@ -553,9 +553,9 @@ public async Task<TR> Request<T, TR>(string topic, T data, string chainId = null
                 .OnResponse += args =>
             {
                 if (args.Response.IsError)
-                    taskSource.SetException(args.Response.Error.ToException());
+                    taskSource.TrySetException(args.Response.Error.ToException());
                 else
-                    taskSource.SetResult(args.Response.Result);
+                    taskSource.TrySetResult(args.Response.Result);
 
                 return Task.CompletedTask;
             };