diff --git a/lnprototest/clightning/clightning.py b/lnprototest/clightning/clightning.py
index 76744cb..1749bdd 100644
--- a/lnprototest/clightning/clightning.py
+++ b/lnprototest/clightning/clightning.py
@@ -167,7 +167,7 @@ def start(self, also_bitcoind: bool = True) -> None:
                 "--network=regtest",
                 "--bitcoin-rpcuser=rpcuser",
                 "--bitcoin-rpcpassword=rpcpass",
-                f"--bitcoin-rpcconnect=localhost:{self.bitcoind.port}",
+                f"--bitcoin-rpcconnect=127.0.0.1:{self.bitcoind.port}",
                 "--log-level=debug",
                 "--log-file=log",
                 "--htlc-maximum-msat=2000sat",