diff --git a/BTCPayServer/Models/WalletViewModels/SignWithSeedViewModel.cs b/BTCPayServer/Models/WalletViewModels/SignWithSeedViewModel.cs
index 7ff09d4ba..8b753cf6c 100644
--- a/BTCPayServer/Models/WalletViewModels/SignWithSeedViewModel.cs
+++ b/BTCPayServer/Models/WalletViewModels/SignWithSeedViewModel.cs
@@ -13,6 +13,7 @@ namespace BTCPayServer.Models.WalletViewModels
         public string SeedOrKey { get; set; }
 
         [Display(Name = "Optional seed passphrase")]
+        [DataType(DataType.Password)]
         public string Passphrase { get; set; }
 
         public ExtKey GetExtKey(Network network)