diff --git a/.env-sample b/.env-sample
index 7a1f48ab..6180043e 100644
--- a/.env-sample
+++ b/.env-sample
@@ -18,7 +18,7 @@ CLN_GRPC_HOST='localhost:9999'
 CLN_GRPC_HOLD_HOST='localhost:9998'
 
 # Bitcoin Core Daemon RPC, used to validate addresses
-BITCOIND_RPCURL = 'http://127.0.0.1:18332'
+BITCOIND_RPCURL = 'http://127.0.0.1:18332' # mainnet 8332
 BITCOIND_RPCUSER = 'robodev'
 BITCOIND_RPCPASSWORD = 'robodev'