diff --git a/scripts/one-chain b/scripts/one-chain
index af5ffe365c..072381c62f 100755
--- a/scripts/one-chain
+++ b/scripts/one-chain
@@ -58,6 +58,8 @@ PROF_PORT=$6
 GRPC_PORT=$7
 SAMOLEANS=$8
 
+GRPC_WEB_PORT=$((GRPC_PORT + 100))
+
 echo "Creating $BINARY instance: home=$CHAIN_DIR | chain-id=$CHAIN_ID | p2p=:$P2P_PORT | rpc=:$RPC_PORT | profiling=:$PROF_PORT | grpc=:$GRPC_PORT | samoleans=:$SAMOLEANS"
 
 # Add dir for chain, exit if error
@@ -128,8 +130,8 @@ else
 fi
 
 # Start gaia
-echo "Start gaia on grpc port: $GRPC_PORT..."
-$BINARY --home $CHAIN_DIR/$CHAIN_ID start --pruning=nothing --grpc.address="0.0.0.0:$GRPC_PORT" --log_level error > $CHAIN_DIR/$CHAIN_ID.log 2>&1 &
+echo "Start gaia on grpc port: $GRPC_PORT & grpc-web port: $GRPC_WEB_PORT..."
+$BINARY --home $CHAIN_DIR/$CHAIN_ID start --grpc-web.address "0.0.0.0:$GRPC_WEB_PORT" --pruning=nothing --grpc.address="0.0.0.0:$GRPC_PORT" --log_level error > $CHAIN_DIR/$CHAIN_ID.log 2>&1 &
 
 # Show validator's and user's balance
 sleep 3