diff --git a/src/Ramstack.HtmxToolkit/HtmxRequestHeaders.cs b/src/Ramstack.HtmxToolkit/HtmxRequestHeaders.cs
index 417a93d..16c098d 100644
--- a/src/Ramstack.HtmxToolkit/HtmxRequestHeaders.cs
+++ b/src/Ramstack.HtmxToolkit/HtmxRequestHeaders.cs
@@ -158,7 +158,7 @@ static HtmxRequestType GetRequestType(IHeaderDictionary dictionary)
     /// <see langword="true" /> if the header value is <c>"true"</c>; otherwise, <see langword="false" />.
     /// </returns>
     private static bool GetBoolean(IHeaderDictionary dictionary, string key) =>
-        dictionary.TryGetValue(key, out var value) && value[0] == "true";
+        dictionary.TryGetValue(key, out var value) && value is ["true"];
 
     /// <summary>
     /// Gets the value of the specified header.