diff --git a/src/services/windows-media-tts.ts b/src/services/windows-media-tts.ts
index 496ef8a..c1e0f2a 100644
--- a/src/services/windows-media-tts.ts
+++ b/src/services/windows-media-tts.ts
@@ -25,16 +25,23 @@ function windowsMediaPreamble(): string {
     "Add-Type -AssemblyName System.Runtime.WindowsRuntime;",
     "$null = [Windows.Media.SpeechSynthesis.SpeechSynthesizer, Windows.Media.SpeechSynthesis, ContentType=WindowsRuntime];",
     "$null = [Windows.Storage.Streams.DataReader, Windows.Storage.Streams, ContentType=WindowsRuntime];",
-    "$null = [Windows.Foundation.AsyncStatus, Windows.Foundation, ContentType=WindowsRuntime];",
     "function Await-WinRt($operation) {",
-    "  while ($operation.Status -eq [Windows.Foundation.AsyncStatus]::Started) { Start-Sleep -Milliseconds 10 }",
-    "  if ($operation.Status -eq [Windows.Foundation.AsyncStatus]::Completed) { return $operation.GetResults() }",
-    "  if ($operation.Status -eq [Windows.Foundation.AsyncStatus]::Canceled) { throw 'WinRT async operation canceled.' }",
-    "  if ($operation.Status -eq [Windows.Foundation.AsyncStatus]::Error) {",
-    "    if ($operation.ErrorCode) { throw $operation.ErrorCode }",
-    "    throw 'WinRT async operation failed.'",
-    "  }",
-    "  throw ('Unexpected WinRT async status: ' + [string]$operation.Status)",
+    "  $interfaceType = $operation.GetType().GetInterfaces() | Where-Object {",
+    "    $_.IsGenericType -and $_.GetGenericTypeDefinition().FullName -eq 'Windows.Foundation.IAsyncOperation`1'",
+    "  } | Select-Object -First 1;",
+    "  if (-not $interfaceType) { throw 'IAsyncOperation<T> 인터페이스를 찾지 못했습니다.' }",
+    "  $resultType = $interfaceType.GetGenericArguments()[0];",
+    "  $method = [System.WindowsRuntimeSystemExtensions].GetMethods() | Where-Object {",
+    "    $_.Name -eq 'AsTask' -and",
+    "    $_.IsGenericMethodDefinition -and",
+    "    $_.GetGenericArguments().Count -eq 1 -and",
+    "    $_.GetParameters().Count -eq 1 -and",
+    "    $_.GetParameters()[0].ParameterType.IsGenericType -and",
+    "    $_.GetParameters()[0].ParameterType.GetGenericTypeDefinition().FullName -eq 'Windows.Foundation.IAsyncOperation`1'",
+    "  } | Select-Object -First 1;",
+    "  if (-not $method) { throw 'System.WindowsRuntimeSystemExtensions.AsTask(IAsyncOperation<T>) 를 찾지 못했습니다.' }",
+    "  $task = $method.MakeGenericMethod(@($resultType)).Invoke($null, @($operation));",
+    "  return $task.GetAwaiter().GetResult();",
     "}",
   ].join(" ");
 }