diff --git a/package.json b/package.json
index a39f9ff..225e76a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tornado/tornado-oracles",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "Gas oracle for Tornado-specific transactions",
   "main": "./lib/index.js",
   "types": "./lib/index.d.ts",
diff --git a/src/feeOracleV4.ts b/src/feeOracleV4.ts
index d46ab00..df21af4 100644
--- a/src/feeOracleV4.ts
+++ b/src/feeOracleV4.ts
@@ -2,7 +2,6 @@ import { defaultWithdrawalGasLimit } from './config';
 import { TornadoFeeOracle } from './feeOracle';
 import { ITornadoFeeOracle, TransactionData, TxType, LegacyGasPrices } from './types';
 import { GasPriceOracle } from '@tornado/gas-price-oracle';
-import { BigNumber } from 'ethers';
 import { bump } from './utils';
 
 export class TornadoFeeOracleV4 extends TornadoFeeOracle implements ITornadoFeeOracle {
@@ -17,8 +16,8 @@ export class TornadoFeeOracleV4 extends TornadoFeeOracle implements ITornadoFeeO
     super(chainId, rpcUrl, gasPriceOracle);
   }
 
-  async getGasLimit(tx?: TransactionData, type: TxType = 'other', bumpPercent?: number): Promise<number> {
-    if (type === 'user_withdrawal') return BigNumber.from(defaultWithdrawalGasLimit[this.chainId]).toNumber();
+  async getGasLimit(tx?: TransactionData, type: TxType = 'other', bumpPercent: number = 0): Promise<number> {
+    if (type === 'user_withdrawal') return bump(defaultWithdrawalGasLimit[this.chainId], bumpPercent).toNumber();
 
     // Need to bump relayer gas limit for transaction, because predefined gas limit to small to be 100% sure that transaction will be sent
     // This leads to fact that relayer often pays extra for gas from his own funds, however, this was designed by previous developers
@@ -27,7 +26,7 @@ export class TornadoFeeOracleV4 extends TornadoFeeOracle implements ITornadoFeeO
     // For compatibility reasons, when wee check user-provided fee for V4 withdrawal transaction, we need dump gas limit
     // for about 20 percent,so that the transaction will be sent, even if it results in some loss for the relayer
     if (type === 'relayer_withdrawal_check_v4') return bump(defaultWithdrawalGasLimit[this.chainId], -25).toNumber();
-    if (!tx) return 21_000;
+    if (!tx) return bump(21_000, bumpPercent).toNumber();
 
     return (await this.provider.estimateGas(tx)).toNumber();
   }