diff --git a/app/components/candidates/Apply.vue b/app/components/candidates/Apply.vue
index 86001bd1..bbdb4d6a 100644
--- a/app/components/candidates/Apply.vue
+++ b/app/components/candidates/Apply.vue
@@ -136,6 +136,7 @@ import {
 import coinbaseAddress from '../../../validators/coinbaseAddress.js'
 // import nodeUrl from '../../../validators/nodeUrl.js'
 import NumberInput from '../NumberInput.vue'
+import BigNumber from 'bignumber.js'
 import store from 'store'
 import VueQrcode from '@chenfengyuan/vue-qrcode'
 import axios from 'axios'
@@ -287,9 +288,9 @@ export default {
                 let contract = await self.getTomoValidatorInstance()
                 let txParams = {
                     from : self.account,
-                    value: parseFloat(value) * 10 ** 18,
-                    gasPrice: 2500,
-                    gas: 2000000
+                    value: self.web3.utils.toHex(new BigNumber(value).multipliedBy(10 ** 18).toString(10)),
+                    gasPrice: self.web3.utils.toHex(2500),
+                    gas: self.web3.utils.toHex(2000000)
                 }
                 let rs
                 if (self.NetworkProvider === 'ledger') {
diff --git a/app/components/candidates/Resign.vue b/app/components/candidates/Resign.vue
index 7c4d6a26..8145c7c2 100644
--- a/app/components/candidates/Resign.vue
+++ b/app/components/candidates/Resign.vue
@@ -94,8 +94,8 @@ export default {
                 let coinbase = self.coinbase
                 let txParams = {
                     from: account,
-                    gasPrice: 2500,
-                    gas: 2000000
+                    gasPrice: self.web3.utils.toHex(2500),
+                    gas: self.web3.utils.toHex(2000000)
                 }
                 let rs
                 if (self.NetworkProvider === 'ledger') {
diff --git a/app/components/candidates/Withdraw.vue b/app/components/candidates/Withdraw.vue
index abae2cd4..0fe58e84 100644
--- a/app/components/candidates/Withdraw.vue
+++ b/app/components/candidates/Withdraw.vue
@@ -179,8 +179,8 @@ export default {
                 console.log('==>', blockNumber, index)
                 let txParams = {
                     from: account,
-                    gasPrice: 2500,
-                    gas: 2000000
+                    gasPrice: self.web3.utils.toHex(2500),
+                    gas: self.web3.utils.toHex(2000000)
                 }
                 let wd
                 if (self.NetworkProvider === 'ledger') {
diff --git a/app/components/voters/Unvoting.vue b/app/components/voters/Unvoting.vue
index a835f6e7..a53dc1e8 100644
--- a/app/components/voters/Unvoting.vue
+++ b/app/components/voters/Unvoting.vue
@@ -283,8 +283,8 @@ export default {
                 let contract = await self.getTomoValidatorInstance()
                 let txParams = {
                     from: account,
-                    gasPrice: 2500,
-                    gas: 1000000
+                    gasPrice: self.web3.utils.toHex(2500),
+                    gas: self.web3.utils.toHex(1000000)
                 }
                 let rs
                 if (self.NetworkProvider === 'ledger') {
diff --git a/app/components/voters/Voting.vue b/app/components/voters/Voting.vue
index 5109aec7..cd55b586 100644
--- a/app/components/voters/Voting.vue
+++ b/app/components/voters/Voting.vue
@@ -282,9 +282,9 @@ export default {
                 let contract = await self.getTomoValidatorInstance()
                 let txParams = {
                     from: account,
-                    value: new BigNumber(this.voteValue).multipliedBy(10 ** 18).toNumber(),
-                    gasPrice: 2500,
-                    gas: 1000000
+                    value: self.web3.utils.toHex(new BigNumber(this.voteValue).multipliedBy(10 ** 18).toString(10)),
+                    gasPrice: self.web3.utils.toHex(2500),
+                    gas: self.web3.utils.toHex(1000000)
                 }
                 let rs
                 if (self.NetworkProvider === 'ledger') {