diff --git a/BTCPayServer/Views/Account/LoginWithU2F.cshtml b/BTCPayServer/Views/Account/LoginWithU2F.cshtml
index 47925f321..f1048049d 100644
--- a/BTCPayServer/Views/Account/LoginWithU2F.cshtml
+++ b/BTCPayServer/Views/Account/LoginWithU2F.cshtml
@@ -5,7 +5,10 @@
     <input type="hidden" asp-for="Challenge" />
     <input type="hidden" asp-for="AppId" />
     <input type="hidden" asp-for="DeviceResponse" />
-    <input type="hidden" asp-for="Challenges" />
+    @for (int i = 0; i < Model.Challenges.Count; i++)
+    {
+        @Html.HiddenFor(m => m.Challenges[i])
+    }
     <input type="hidden" asp-for="UserId" />
     <input type="hidden" asp-for="RememberMe" />
 </form>