diff --git a/app/MindWork AI Studio/Provider/Anthropic/ChatRequest.cs b/app/MindWork AI Studio/Provider/Anthropic/ChatRequest.cs
index 677381c0..afaef92c 100644
--- a/app/MindWork AI Studio/Provider/Anthropic/ChatRequest.cs	
+++ b/app/MindWork AI Studio/Provider/Anthropic/ChatRequest.cs	
@@ -21,5 +21,5 @@ public readonly record struct ChatRequest(
 {
     
 [JsonExtensionData]
-public Dictionary<string, object?> AdditionalApiParameters { get; init; }
+public Dictionary<string, object> AdditionalApiParameters { get; init; }
 }
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Provider/Fireworks/ChatRequest.cs b/app/MindWork AI Studio/Provider/Fireworks/ChatRequest.cs
index d8fe7e62..cf9f5115 100644
--- a/app/MindWork AI Studio/Provider/Fireworks/ChatRequest.cs	
+++ b/app/MindWork AI Studio/Provider/Fireworks/ChatRequest.cs	
@@ -16,5 +16,5 @@ public readonly record struct ChatRequest(
 {
     
     [JsonExtensionData]
-    public Dictionary<string, object?> AdditionalApiParameters { get; init; }
+    public Dictionary<string, object> AdditionalApiParameters { get; init; }
 }
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Provider/Google/ChatRequest.cs b/app/MindWork AI Studio/Provider/Google/ChatRequest.cs
index e4bb6807..e0b50874 100644
--- a/app/MindWork AI Studio/Provider/Google/ChatRequest.cs	
+++ b/app/MindWork AI Studio/Provider/Google/ChatRequest.cs	
@@ -17,5 +17,5 @@ public readonly record struct ChatRequest(
 {
     
     [JsonExtensionData]
-    public Dictionary<string, object?> AdditionalApiParameters { get; init; }
+    public Dictionary<string, object> AdditionalApiParameters { get; init; }
 }
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Provider/Groq/ChatRequest.cs b/app/MindWork AI Studio/Provider/Groq/ChatRequest.cs
index 70cd438c..50d320bc 100644
--- a/app/MindWork AI Studio/Provider/Groq/ChatRequest.cs	
+++ b/app/MindWork AI Studio/Provider/Groq/ChatRequest.cs	
@@ -19,5 +19,5 @@ public readonly record struct ChatRequest(
 {
     
     [JsonExtensionData]
-    public Dictionary<string, object?> AdditionalApiParameters { get; init; }
+    public Dictionary<string, object> AdditionalApiParameters { get; init; }
 }
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Provider/Mistral/ChatRequest.cs b/app/MindWork AI Studio/Provider/Mistral/ChatRequest.cs
index 54570ed3..48d69bb0 100644
--- a/app/MindWork AI Studio/Provider/Mistral/ChatRequest.cs	
+++ b/app/MindWork AI Studio/Provider/Mistral/ChatRequest.cs	
@@ -20,5 +20,5 @@ public readonly record struct ChatRequest(
 {
     
     [JsonExtensionData]
-    public Dictionary<string, object?> AdditionalApiParameters { get; init; }
+    public Dictionary<string, object> AdditionalApiParameters { get; init; }
 }
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Provider/OpenAI/ChatCompletionAPIRequest.cs b/app/MindWork AI Studio/Provider/OpenAI/ChatCompletionAPIRequest.cs
index fc9b0fe3..d5a30286 100644
--- a/app/MindWork AI Studio/Provider/OpenAI/ChatCompletionAPIRequest.cs	
+++ b/app/MindWork AI Studio/Provider/OpenAI/ChatCompletionAPIRequest.cs	
@@ -19,5 +19,5 @@ public record ChatCompletionAPIRequest(
     }
     
     [JsonExtensionData]
-    public Dictionary<string, object?>? AdditionalApiParameters { get; init; }
+    public Dictionary<string, object>? AdditionalApiParameters { get; init; }
 }
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Provider/OpenAI/ResponsesAPIRequest.cs b/app/MindWork AI Studio/Provider/OpenAI/ResponsesAPIRequest.cs
index d37aa3b0..520e50f4 100644
--- a/app/MindWork AI Studio/Provider/OpenAI/ResponsesAPIRequest.cs	
+++ b/app/MindWork AI Studio/Provider/OpenAI/ResponsesAPIRequest.cs	
@@ -22,5 +22,5 @@ public record ResponsesAPIRequest(
     }
     
     [JsonExtensionData]
-    public Dictionary<string, object?>? AdditionalApiParameters { get; init; }
+    public Dictionary<string, object>? AdditionalApiParameters { get; init; }
 }
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Provider/SelfHosted/ChatRequest.cs b/app/MindWork AI Studio/Provider/SelfHosted/ChatRequest.cs
index bc0687b3..97618492 100644
--- a/app/MindWork AI Studio/Provider/SelfHosted/ChatRequest.cs	
+++ b/app/MindWork AI Studio/Provider/SelfHosted/ChatRequest.cs	
@@ -16,5 +16,5 @@ public readonly record struct ChatRequest(
 {
     
     [JsonExtensionData]
-    public Dictionary<string, object?> AdditionalApiParameters { get; init; }
+    public Dictionary<string, object> AdditionalApiParameters { get; init; }
 }
\ No newline at end of file