diff --git a/src/consts/urlMap.ts b/src/consts/urlMap.ts
index 747248d..640fcc1 100644
--- a/src/consts/urlMap.ts
+++ b/src/consts/urlMap.ts
@@ -1,6 +1,6 @@
 const network = {
   testnet: {
-    rpc: 'https://api.baobab.klaytn.net:8651',
+    rpc: 'https://public-node-api.klaytnapi.com/v1/baobab',
     finder: 'https://baobab.klaytnfinder.io/tx/',
     finderToken: 'https://baobab.klaytnfinder.io/token/',
     finderNFT: 'https://baobab.klaytnfinder.io/nft/',
diff --git a/src/views/Account/AccountKeyMultiSig.tsx b/src/views/Account/AccountKeyMultiSig.tsx
index d0d423f..e6ef1cc 100644
--- a/src/views/Account/AccountKeyMultiSig.tsx
+++ b/src/views/Account/AccountKeyMultiSig.tsx
@@ -93,7 +93,7 @@ const AccountKeyMultiSig = (): ReactElement => {
   }
 
   const { newKeyring, newKeyringErrMsg } = useMemo(() => {
-    if (keyring && newPrivateKeyList) {
+    if (keyring && numOfNewPrivateKey <= newPrivateKeyList.length) {
       try {
         return {
           newKeyring: caver.wallet.keyring.create(
diff --git a/src/views/KCT/KIP17Deploy.tsx b/src/views/KCT/KIP17Deploy.tsx
index 6ded415..689dc20 100644
--- a/src/views/KCT/KIP17Deploy.tsx
+++ b/src/views/KCT/KIP17Deploy.tsx
@@ -1,4 +1,4 @@
-import { ReactElement, useState } from 'react'
+import { ReactElement, useMemo, useState } from 'react'
 import Caver, { Keystore } from 'caver-js'
 import _ from 'lodash'
 
@@ -28,9 +28,9 @@ enum FunctionEnum {
   PUP = 'Pause/Unpause',
 }
 
-const caver = new Caver(URLMAP.network['testnet']['rpc'])
-
 const KIP17Deploy = (): ReactElement => {
+  const caver = useMemo(() => new Caver(URLMAP.network['testnet']['rpc']), [])
+
   const [senderAddress, setSenderAddress] = useState('')
   const [senderKeystoreJSON, setSenderKeystoreJSON] = useState<Keystore>()
   const [senderKeystorePassword, setSenderKeystorePassword] = useState('')
@@ -123,7 +123,8 @@ const KIP17Deploy = (): ReactElement => {
           name: tokenName,
           symbol: tokenSymbol,
         },
-        { from: senderAddress }
+        { from: senderAddress },
+        caver.wallet
       )
 
       setDeployMsg('KIP-17 smart contract is successfully deployed! ')
diff --git a/src/views/KCT/KIP37Deploy.tsx b/src/views/KCT/KIP37Deploy.tsx
index 65350f7..1556b41 100644
--- a/src/views/KCT/KIP37Deploy.tsx
+++ b/src/views/KCT/KIP37Deploy.tsx
@@ -1,4 +1,4 @@
-import { ReactElement, useState } from 'react'
+import { ReactElement, useMemo, useState } from 'react'
 import Caver, { Keystore } from 'caver-js'
 import _ from 'lodash'
 
@@ -27,9 +27,9 @@ enum FunctionEnum {
   MINT = 'Mint',
 }
 
-const caver = new Caver(URLMAP.network['testnet']['rpc'])
-
 const KIP37Deploy = (): ReactElement => {
+  const caver = useMemo(() => new Caver(URLMAP.network['testnet']['rpc']), [])
+
   const [senderAddress, setSenderAddress] = useState('')
   const [senderKeystoreJSON, setSenderKeystoreJSON] = useState<Keystore>()
   const [senderKeystorePassword, setSenderKeystorePassword] = useState('')
@@ -120,10 +120,9 @@ const KIP37Deploy = (): ReactElement => {
 
       setDeployButtonDisabled(true)
       const kip37 = await caver.kct.kip37.deploy(
-        {
-          uri: uri,
-        },
-        { from: senderAddress }
+        { uri: uri },
+        { from: senderAddress },
+        caver.wallet
       )
 
       setDeployMsg('KIP-37 smart contract is successfully deployed! ')
@@ -147,6 +146,7 @@ const KIP37Deploy = (): ReactElement => {
       setCreateButtonDisabled(true)
 
       const deployedContract = new caver.kct.kip37(contractAddress)
+      deployedContract.setWallet(caver.wallet)
       deployedContract.options.from = senderAddress
       const currentTokenId = lastTokenId
       const created = await deployedContract.create(
@@ -182,6 +182,7 @@ const KIP37Deploy = (): ReactElement => {
       setTransferButtonDisabled(true)
 
       const deployedContract = new caver.kct.kip37(contractAddress)
+      deployedContract.setWallet(caver.wallet)
       deployedContract.options.from = senderAddress
       const transferred = await deployedContract.safeTransferFrom(
         senderAddress,
@@ -224,6 +225,7 @@ const KIP37Deploy = (): ReactElement => {
       setMintButtonDisabled(true)
 
       const deployedContract = new caver.kct.kip37(contractAddress)
+      deployedContract.setWallet(caver.wallet)
       deployedContract.options.from = senderAddress
       const currentTokenId = lastTokenId - 1
       const minted = await deployedContract.mint(
diff --git a/src/views/KCT/KIP7Deploy.tsx b/src/views/KCT/KIP7Deploy.tsx
index 1511452..f132193 100644
--- a/src/views/KCT/KIP7Deploy.tsx
+++ b/src/views/KCT/KIP7Deploy.tsx
@@ -1,4 +1,4 @@
-import { ReactElement, useState } from 'react'
+import { ReactElement, useMemo, useState } from 'react'
 import Caver, { Keystore } from 'caver-js'
 import _ from 'lodash'
 
@@ -20,9 +20,9 @@ import {
 } from 'components'
 import FormFile from 'components/FormFile'
 
-const caver = new Caver(URLMAP.network['testnet']['rpc'])
-
 const KIP7Deploy = (): ReactElement => {
+  const caver = useMemo(() => new Caver(URLMAP.network['testnet']['rpc']), [])
+
   const [senderAddress, setSenderAddress] = useState('')
   const [senderKeystoreJSON, setSenderKeystoreJSON] = useState<Keystore>()
   const [senderKeystorePassword, setSenderKeystorePassword] = useState('')
@@ -94,7 +94,8 @@ const KIP7Deploy = (): ReactElement => {
           decimals: Number(decimal),
           initialSupply: initialSupply,
         },
-        { from: senderAddress }
+        { from: senderAddress },
+        caver.wallet
       )
 
       setDeploySuccess(true)
diff --git a/src/views/Web3modal/web3modalNFT.tsx b/src/views/Web3modal/web3modalNFT.tsx
index 1487e44..b4c3301 100644
--- a/src/views/Web3modal/web3modalNFT.tsx
+++ b/src/views/Web3modal/web3modalNFT.tsx
@@ -365,7 +365,7 @@ const Web3modalNFT = (): ReactElement => {
                       onChange={setTokenIdForMint}
                       value={tokenIdForMint}
                     />
-                    <Label>Toekn URI</Label>
+                    <Label>Token URI</Label>
                     <SFormInput
                       placeholder={'Token URI'}
                       onChange={setTokenURIForMint}