diff --git a/bin/basicswap_prepare.py b/bin/basicswap_prepare.py
index cd36ef8..4897da1 100755
--- a/bin/basicswap_prepare.py
+++ b/bin/basicswap_prepare.py
@@ -1589,7 +1589,7 @@ def main():
             'use_csv': False,
             'blocks_confirmed': 1,
             'conf_target': 2,
-            'core_version_group': 18,
+            'core_version_group': 14,
             'chain_lookups': 'local',
         },
         'navcoin': {