diff --git a/src/SocksSharp/ProxyClientHandler.cs b/src/SocksSharp/ProxyClientHandler.cs
index a6489a4..4199029 100644
--- a/src/SocksSharp/ProxyClientHandler.cs
+++ b/src/SocksSharp/ProxyClientHandler.cs
@@ -20,7 +20,7 @@ namespace SocksSharp
     /// to provide the <see cref="HttpClient"/> support for <see cref="IProxy"/> proxy type
     /// </summary>
     /// <typeparam name="T"></typeparam>
-    public class ProxyClientHandler<T> : HttpMessageHandler, IDisposable where T : IProxy
+    public class ProxyClientHandler<T> : DelegatingHandler, IDisposable where T : IProxy
     {
         private readonly IProxyClient<T> proxyClient;