diff --git a/.gitmodules b/.gitmodules
index e69de29..8b13789 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1 @@
+
diff --git a/libexec/dapp/dapp---testnet-launch b/libexec/dapp/dapp---testnet-launch
index 763cedc..ae64b5a 100755
--- a/libexec/dapp/dapp---testnet-launch
+++ b/libexec/dapp/dapp---testnet-launch
@@ -10,6 +10,7 @@ period=seconds     use a block time instead of instamine
 accounts=number    create multiple accounts (default: 1)
 save=name          after finishing, save snapshot
 load=name          start from a previously saved snapshot
+rpc-host=host      change RPC host (default: \`localhost')
 "
 
 eval "$(
@@ -25,6 +26,7 @@ while [[ $1 ]]; do
   case $1 in
     --)          shift; break;;
     --rpc-port)  shift; RPC_PORT=$1;;
+    --rpc-host)   shift; RPC_HOST=$1;;
     --chain-id)  shift; CHAINID=$1;;
     --period)    shift; PERIOD=$1;;
     --accounts)  shift; ACCOUNTS=$(($1 - 1));;
@@ -77,7 +79,7 @@ else
   geth 2>/dev/null --datadir "$chaindir" init "$chaindir/config/genesis.json"
 fi
 
-export ETH_RPC_URL=http://127.0.0.1:$RPC_PORT
+export ETH_RPC_URL=http://${RPC_HOST-localhost}:$RPC_PORT
 
 port=$((RPC_PORT + 30000))
 
@@ -95,8 +97,9 @@ set +m
 geth \
   2> >(tee "$chaindir/geth.log" | grep --line-buffered Success | sed 's/^/geth: /' >&2) \
   --datadir "$chaindir" --networkid "$CHAINID" --port="$port" \
+  --rpcaddr "${RPC_HOST-localhost}" \
   --mine --minerthreads=1 \
-  --rpc --rpcapi "web3,eth,net,debug" --rpccorsdomain '*' --nodiscover \
+  --rpc --rpcapi "web3,eth,net,debug" --rpccorsdomain '*' \
   --rpcport="$RPC_PORT" --unlock="$(IFS=,; echo "${address[*]}")" --password=<(exit) &
 
 gethpid=$!
@@ -128,4 +131,4 @@ if [[ $1 ]]; then
   "$@"
 else
   while true; do sleep 3600; done
-fi
+fi
\ No newline at end of file