diff --git a/packages/cli/src/util/feeRecipient.ts b/packages/cli/src/util/feeRecipient.ts
index 4d6d1f3e5833..4b3d147ce95f 100644
--- a/packages/cli/src/util/feeRecipient.ts
+++ b/packages/cli/src/util/feeRecipient.ts
@@ -1,16 +1,9 @@
 import {ExecutionAddress} from "@chainsafe/lodestar-types";
 import {fromHex} from "@chainsafe/lodestar-utils";
 
-export function parseFeeRecipientHex(feeRecipientHexString: string): string {
-  const hexPattern = new RegExp(/^(0x|0X)(?<feeRecipientString>[a-fA-F0-9]{40})$/, "g");
-  const feeRecipientStringMatch = hexPattern.exec(feeRecipientHexString);
-  const feeRecipientString = feeRecipientStringMatch?.groups?.feeRecipientString;
-  if (feeRecipientString === undefined)
-    throw Error(`Invalid feeRecipient= ${feeRecipientHexString}, expected format: ^0x[a-fA-F0-9]{40}$`);
-  return feeRecipientString;
-}
-
-export function parseFeeRecipient(feeRecipientHexString: string): ExecutionAddress {
-  const feeRecipientHex = parseFeeRecipientHex(feeRecipientHexString);
-  return fromHex(feeRecipientHex);
+export function parseFeeRecipient(feeRecipientHex: string): ExecutionAddress {
+  if (!/^0x[a-fA-F0-9]{40}$/i.test(feeRecipientHex)) {
+    throw Error(`Invalid feeRecipient= ${feeRecipientHex}, expected format: ^0x[a-fA-F0-9]{40}$`);
+  }
+  return fromHex(feeRecipientHex.toLowerCase());
 }
diff --git a/packages/cli/test/unit/validator/options.test.ts b/packages/cli/test/unit/validator/options.test.ts
index 7c2211c5dcd1..5d20d22cc11a 100644
--- a/packages/cli/test/unit/validator/options.test.ts
+++ b/packages/cli/test/unit/validator/options.test.ts
@@ -4,7 +4,7 @@ import {parseFeeRecipient} from "../../../src/util";
 const feeRecipient = Buffer.from(Array.from({length: 20}, () => Math.round(Math.random() * 255)));
 const feeRecipientString = feeRecipient.toString("hex");
 
-describe("parseFeeRecipient", () => {
+describe("validator / parseFeeRecipient", () => {
   const testCases: string[] = [`0x${feeRecipientString}`, `0X${feeRecipientString}`];
   for (const testCase of testCases) {
     it(`parse ${testCase}`, () => {
@@ -13,7 +13,7 @@ describe("parseFeeRecipient", () => {
   }
 });
 
-describe("invalid feeRecipient", () => {
+describe("validator / invalid feeRecipient", () => {
   const testCases: string[] = [
     feeRecipientString,
     `X0${feeRecipientString}`,