diff --git a/Assets/Scripts/entitlement/OAuth2Identity.cs b/Assets/Scripts/entitlement/OAuth2Identity.cs
index 955c158f..cc5f9e28 100644
--- a/Assets/Scripts/entitlement/OAuth2Identity.cs
+++ b/Assets/Scripts/entitlement/OAuth2Identity.cs
@@ -881,7 +881,7 @@ void onSubmit(object sender, string deviceCode)
                 }
 
                 // TODO: For Unity 2021+
-                var www = UnityWebRequest.Post($"{m_LoginUrl}?device_code={m_VerificationCode}", "{}");
+                var www = UnityWebRequest.PostWwwForm($"{m_LoginUrl}?device_code={m_VerificationCode}", "{}");
 
                 yield return www.SendWebRequest();
                 if (www.isNetworkError)