diff --git a/README.md b/README.md
index fe997d0..5775822 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,7 @@ Run `make installer` ('installer.tar.gz' will be placed in build directory)
 1. `node app.js` will start the message board with ixrpl account data.
 1. Optional environment `MB_DEV=1` for dev mode, if not given it'll be prod mode.
 1. Optional environment `MB_FILE_LOG=1` will keep logging in a log file inside log directory (used for debugging).
+1. Optional environment `MB_DATA_DIR=. node app.js` will read the config files(both 'mb-xrpl.cfg' and 'secret.cfg') from same level of hierarchy.
 1. This will listen to redeems on the configured host xrpl account.
 1. If sashimono agent and sashi CLI is up, this will issue instance management commands to the CLI.
 1. Responses data will be encrypted with redeem transaction account's pubkey and sent back to it as a transaction.