diff --git a/src/Ramstack.HtmxToolkit/AjaxContext.cs b/src/Ramstack.HtmxToolkit/AjaxContext.cs
index 89d91c5..3b5a166 100644
--- a/src/Ramstack.HtmxToolkit/AjaxContext.cs
+++ b/src/Ramstack.HtmxToolkit/AjaxContext.cs
@@ -42,8 +42,9 @@ public sealed class AjaxContext
 
     /// <summary>
     /// Gets or sets the headers to include with the request.
+    /// Header values must be strings; complex data should be passed as a pre-serialized JSON string.
     /// </summary>
-    public object? Headers { get; set; }
+    public IDictionary<string, string>? Headers { get; set; }
 
     /// <summary>
     /// Gets or sets a selector used to filter the content to swap from the response.
diff --git a/src/Ramstack.HtmxToolkit/AjaxContextWrapper.cs b/src/Ramstack.HtmxToolkit/AjaxContextWrapper.cs
index be97d27..fcd249b 100644
--- a/src/Ramstack.HtmxToolkit/AjaxContextWrapper.cs
+++ b/src/Ramstack.HtmxToolkit/AjaxContextWrapper.cs
@@ -29,6 +29,6 @@ public AjaxContextWrapper(string path, AjaxContext context)
     [JsonPropertyName("target")]  public string? Target => _context.Target;
     [JsonPropertyName("swap")]    public string? Swap => _context.Swap.GetSwapValue();
     [JsonPropertyName("values")]  public object? Values => _context.Values;
-    [JsonPropertyName("headers")] public object? Headers => _context.Headers;
+    [JsonPropertyName("headers")] public IDictionary<string, string>? Headers => _context.Headers;
     [JsonPropertyName("select")]  public string? Select => _context.Select;
 }