diff --git a/app/MindWork AI Studio/Provider/Anthropic/ProviderAnthropic.cs b/app/MindWork AI Studio/Provider/Anthropic/ProviderAnthropic.cs
index 8a70ca47..512c4bf3 100644
--- a/app/MindWork AI Studio/Provider/Anthropic/ProviderAnthropic.cs	
+++ b/app/MindWork AI Studio/Provider/Anthropic/ProviderAnthropic.cs	
@@ -28,7 +28,7 @@ public sealed class ProviderAnthropic() : BaseProvider("https://api.anthropic.co
             yield break;
         
         // Parse the API parameters:
-        var apiParameters = this.ParseApiParameters(this.AdditionalJsonApiParameters, ["system"]);
+        var apiParameters = this.ParseApiParameters(this.AdditionalJsonApiParameters, "system");
 
         // Prepare the Anthropic HTTP chat request:
         var chatRequest = JsonSerializer.Serialize(new ChatRequest
diff --git a/app/MindWork AI Studio/Provider/BaseProvider.cs b/app/MindWork AI Studio/Provider/BaseProvider.cs
index 553b0aef..2db87fdc 100644
--- a/app/MindWork AI Studio/Provider/BaseProvider.cs	
+++ b/app/MindWork AI Studio/Provider/BaseProvider.cs	
@@ -526,7 +526,7 @@ public abstract class BaseProvider : IProvider, ISecretId
     /// <param name="keysToRemove">Optional list of keys to remove from the final dictionary (case-insensitive). stream, model and messages are removed by default.</param>
     protected IDictionary<string, object> ParseApiParameters(
         string additionalUserProvidedParameters,
-        IEnumerable<string>? keysToRemove = null)
+        params IEnumerable<string> keysToRemove)
     {
         try
         {
diff --git a/app/MindWork AI Studio/Provider/OpenAI/ProviderOpenAI.cs b/app/MindWork AI Studio/Provider/OpenAI/ProviderOpenAI.cs
index 639d72ea..61625e05 100644
--- a/app/MindWork AI Studio/Provider/OpenAI/ProviderOpenAI.cs	
+++ b/app/MindWork AI Studio/Provider/OpenAI/ProviderOpenAI.cs	
@@ -87,7 +87,7 @@ public sealed class ProviderOpenAI() : BaseProvider("https://api.openai.com/v1/"
         
         
         // Parse the API parameters:
-        var apiParameters = this.ParseApiParameters(this.AdditionalJsonApiParameters, ["input", "store", "tools"]);
+        var apiParameters = this.ParseApiParameters(this.AdditionalJsonApiParameters, "input", "store", "tools");
         
         //
         // Create the request: either for the Responses API or the Chat Completion API