diff --git a/docker-compose-generator/docker-fragments/bitcoin.yml b/docker-compose-generator/docker-fragments/bitcoin.yml
index cf76496..50cdc80 100644
--- a/docker-compose-generator/docker-fragments/bitcoin.yml
+++ b/docker-compose-generator/docker-fragments/bitcoin.yml
@@ -8,6 +8,7 @@ services:
       environment:
         BITCOIN_NETWORK: ${NBITCOIN_NETWORK:-regtest}
         BITCOIN_EXTRA_ARGS: |
+          rpcport=43782
           rpcbind=0.0.0.0:43782
           port=39388
           disablewallet=1