diff --git a/basicswap/wallet_backend.py b/basicswap/wallet_backend.py
index d5a0281..9ee81d5 100644
--- a/basicswap/wallet_backend.py
+++ b/basicswap/wallet_backend.py
@@ -475,6 +475,9 @@ class ElectrumBackend(WalletBackend):
                         "transaction already exists",
                         "insufficient fee",
                         "dust",
+                        "non-bip68-final",
+                        "non-final",
+                        "locktime",
                     ]
                 ):
                     raise