diff --git a/lib/wallet.js b/lib/wallet.js
index b00eea52..161dc519 100644
--- a/lib/wallet.js
+++ b/lib/wallet.js
@@ -62,7 +62,7 @@ function _balance (settings, cryptoCode) {
 function sendCoins (settings, tx) {
   return fetchWallet(settings, tx.cryptoCode)
     .then(r => {
-      const feeMultiplier = configManager.getWalletSettings(tx.cryptoCode, settings.config).feeMultiplier
+      const feeMultiplier = new BN(configManager.getWalletSettings(tx.cryptoCode, settings.config).feeMultiplier)
       console.log('** DEBUG MINERS FEE ** - Fee multiplier: ', feeMultiplier)
       return r.wallet.sendCoins(r.account, tx, settings, r.operatorId, feeMultiplier)
         .then(res => {
@@ -81,7 +81,7 @@ function sendCoins (settings, tx) {
 function sendCoinsBatch (settings, txs, cryptoCode) {
   return fetchWallet(settings, cryptoCode)
     .then(r => {
-      const feeMultiplier = configManager.getWalletSettings(cryptoCode, settings.config).feeMultiplier
+      const feeMultiplier = new BN(configManager.getWalletSettings(cryptoCode, settings.config).feeMultiplier)
       return r.wallet.sendCoinsBatch(r.account, txs, cryptoCode, feeMultiplier)
         .then(res => {
           mem.clear(module.exports.balance)