diff --git a/package.json b/package.json
index 930f3c0..30bb7ce 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tornado/tornado-oracles",
-  "version": "1.4.1",
+  "version": "1.4.2",
   "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 df21af4..8f51ebd 100644
--- a/src/feeOracleV4.ts
+++ b/src/feeOracleV4.ts
@@ -26,8 +26,8 @@ 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 bump(21_000, bumpPercent).toNumber();
+    if (!tx || Object.keys(tx).length === 0) return bump(21_000, bumpPercent).toNumber();
 
-    return (await this.provider.estimateGas(tx)).toNumber();
+    return bump(await this.provider.estimateGas(tx), bumpPercent).toNumber();
   }
 }