diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityWebRequestException.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityWebRequestException.cs
index efd1565..9a164ab 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityWebRequestException.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityWebRequestException.cs
@@ -33,7 +33,10 @@ namespace Cysharp.Threading.Tasks
             this.ResponseCode = unityWebRequest.responseCode;
             if (UnityWebRequest.downloadHandler != null)
             {
-                this.Text = unityWebRequest.downloadHandler.text;
+                if (unityWebRequest.downloadHandler is DownloadHandlerBuffer dhb)
+                {
+                    this.Text = dhb.text;
+                }
             }
         }
 
diff --git a/src/UniTask/Assets/Scenes/SandboxMain.cs b/src/UniTask/Assets/Scenes/SandboxMain.cs
index f84ced7..a96fb90 100644
--- a/src/UniTask/Assets/Scenes/SandboxMain.cs
+++ b/src/UniTask/Assets/Scenes/SandboxMain.cs
@@ -476,8 +476,8 @@ public class SandboxMain : MonoBehaviour
 
     async UniTaskVoid Start()
     {
-        var url =  "http://fooooooooooooooooooooooooooooooooooo.com";
-        var webRequestAsyncOperation = UnityWebRequest.Head(url).SendWebRequest();
+        var url =  "http://google.com/404";
+        var webRequestAsyncOperation = UnityWebRequest.Get(url).SendWebRequest();
         await webRequestAsyncOperation.ToUniTask();
 
         //PlayerLoopInfo.Inject();