diff --git a/backend/package.json b/backend/package.json
index f227921..f0c38ed 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "arka",
-  "version": "1.6.3",
+  "version": "1.6.4",
   "description": "ARKA - (Albanian for Cashier's case) is the first open source Paymaster as a service software",
   "type": "module",
   "directories": {
diff --git a/backend/src/paymaster/index.ts b/backend/src/paymaster/index.ts
index e918e68..d0ae866 100644
--- a/backend/src/paymaster/index.ts
+++ b/backend/src/paymaster/index.ts
@@ -247,7 +247,7 @@ export class Paymaster {
         const ETHprice = await nativeOracleContract.latestRoundData();
         ETHUSDPrice = ETHprice.answer;
         ETHUSDPriceDecimal = await nativeOracleContract.decimals();
-        result.etherUSDExchangeRate = ETHprice.answer;
+        result.etherUSDExchangeRate = BigNumber.from(ETHprice.answer).toHexString();
       }
       for (let i = 0; i < tokens_list.length; i++) {
         const gasToken = tokens_list[i];