diff --git a/README.md b/README.md
index e9025a31..31acbc87 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 | Statements                  | Branches                | Functions                 | Lines             |
 | --------------------------- | ----------------------- | ------------------------- | ----------------- |
-| ![Statements](https://img.shields.io/badge/statements-96.21%25-brightgreen.svg?style=flat) | ![Branches](https://img.shields.io/badge/branches-93.59%25-brightgreen.svg?style=flat) | ![Functions](https://img.shields.io/badge/functions-96.65%25-brightgreen.svg?style=flat) | ![Lines](https://img.shields.io/badge/lines-96.37%25-brightgreen.svg?style=flat) |
+| ![Statements](https://img.shields.io/badge/statements-96.23%25-brightgreen.svg?style=flat) | ![Branches](https://img.shields.io/badge/branches-93.62%25-brightgreen.svg?style=flat) | ![Functions](https://img.shields.io/badge/functions-96.66%25-brightgreen.svg?style=flat) | ![Lines](https://img.shields.io/badge/lines-96.39%25-brightgreen.svg?style=flat) |
 
 
 ## 1. Introduction
diff --git a/src/wallet/index.js b/src/wallet/index.js
index 2bfc5f46..8ce22064 100644
--- a/src/wallet/index.js
+++ b/src/wallet/index.js
@@ -253,6 +253,13 @@ const sign = (hexString, keyPair) => {
   return getSignature(bytesToBeSign, keyPair);
 };
 
+const hexToDecimal = x => ellipticEc.keyFromPrivate(x, 'hex').getPrivate().toString(10);
+
+/**
+ * @param {string} signature Signature
+ * @param {string} msgHash Message for signing
+ * @param {string} pubKey deprecatedParam - This parameter is deprecated.
+ */
 const verify = (signature, msgHash, pubKey) => {
   const rHex = signature.substring(0, 64);
   const sHex = signature.substring(64, 128);
@@ -262,7 +269,19 @@ const verify = (signature, msgHash, pubKey) => {
     s: new BN(sHex, 16),
     recoveryParam: recoveryParamHex.slice(1),
   };
-  return ellipticEc.verify(msgHash, sigObj, Buffer.from(pubKey, 'hex'));
+  let publicKey;
+  if (!pubKey) {
+    const key = ellipticEc.recoverPubKey(
+      hexToDecimal(msgHash),
+      sigObj,
+      +sigObj.recoveryParam,
+      'hex'
+    );
+    publicKey = ellipticEc.keyFromPublic(key).getPublic('hex');
+  } else {
+    publicKey = pubKey;
+  }
+  return ellipticEc.verify(msgHash, sigObj, Buffer.from(publicKey, 'hex'));
 };
 
 export default {
diff --git a/test/unit/wallet/index.test.js b/test/unit/wallet/index.test.js
index 51062fa7..f47a8d9c 100644
--- a/test/unit/wallet/index.test.js
+++ b/test/unit/wallet/index.test.js
@@ -102,5 +102,8 @@ describe('test wallet', () => {
       'b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9';
     const isValid = Wallet.verify(signature.toString('hex'), msgHash, pubKey);
     expect(isValid).toBe(true);
+
+    const isValidNoPubKey = Wallet.verify(signature.toString('hex'), msgHash);
+    expect(isValidNoPubKey).toBe(true);
   });
 });