diff --git a/apis/candidates.js b/apis/candidates.js
index 1c08db59..4432116a 100644
--- a/apis/candidates.js
+++ b/apis/candidates.js
@@ -741,13 +741,8 @@ router.put('/update', [
             set['dataCenter.location'] = body.dcLocation
         }
 
-        if (body.website) {
-            set['socials.website'] = body.website
-        }
-
-        if (body.telegram) {
-            set['socials.telegram'] = body.telegram
-        }
+        set['socials.website'] = body.website || ''
+        set['socials.telegram'] = body.telegram || ''
 
         const address = await web3.eth.accounts.recover(message, signedMessage)
 
diff --git a/apis/voters.js b/apis/voters.js
index 7c215708..1abd632c 100644
--- a/apis/voters.js
+++ b/apis/voters.js
@@ -373,17 +373,20 @@ router.get('/calculatingReward1Day', [], async (req, res, next) => {
         const capacity = new BigNumber(candidate.capacity).div(10 ** 18)
         const totalReward = new BigNumber(config.get('blockchain.reward'))
         // get total signers in latest epoch
-        const totalSigners = await axios.post(
-            urljoin(config.get('tomoscanUrl'), `api/expose/totalSignNumber/${epoch}`)
-        )
+        let totalSigners
+        if (epoch) {
+            totalSigners = await axios.post(
+                urljoin(config.get('tomoscanUrl'), `api/expose/totalSignNumber/${epoch}`)
+            )
+        }
 
-        if (totalSigners.data && totalSigners.data.totalSignNumber) {
+        if (totalSigners && totalSigners.data && totalSigners.data.totalSignNumber) {
             // calculate devided reward
             const masternodeReward = totalReward.multipliedBy(signNumber).dividedBy(totalSigners.data.totalSignNumber)
 
             // calculate voter reward 1 day
-            const estimateReward = masternodeReward
-                .multipliedBy((amount.div(0.5))).div(capacity.plus(amount)).multipliedBy(await epochIn1Day) || 'N/A'
+            const estimateReward = masternodeReward.multipliedBy(0.5)
+                .multipliedBy(amount).div(capacity.plus(amount)).multipliedBy(await epochIn1Day) || 'N/A'
             return res.send(estimateReward.toString(10))
         }
         return res.send('N/A')
diff --git a/app/components/candidates/Update.vue b/app/components/candidates/Update.vue
index 1126a04c..46628adb 100644
--- a/app/components/candidates/Update.vue
+++ b/app/components/candidates/Update.vue
@@ -68,6 +68,9 @@
                             <b-form-input
                                 v-model="website"
                                 name="website-value"/>
+                            <span
+                                v-if="$v.website.$dirty && !$v.website.url"
+                                class="text-danger">Not an url</span>
                         </b-form-group>
                         <b-form-group
                             class="col-md-6"
@@ -76,6 +79,9 @@
                             <b-form-input
                                 v-model="telegram"
                                 name="telegram-value"/>
+                            <span
+                                v-if="$v.telegram.$dirty && !$v.telegram.url"
+                                class="text-danger">Not an url</span>
                         </b-form-group>
                     </div>
                     <div class="buttons text-right">
@@ -157,7 +163,8 @@ import { validationMixin } from 'vuelidate'
 import {
     required,
     minLength,
-    maxLength
+    maxLength,
+    url
 } from 'vuelidate/lib/validators'
 import axios from 'axios'
 import VueQrcode from '@chenfengyuan/vue-qrcode'
@@ -207,7 +214,9 @@ export default {
         dcLocation: {
             maxLength: maxLength(30),
             minLength: minLength(2)
-        }
+        },
+        website: { url },
+        telegram: { url }
     },
     beforeDestroy () {
         if (this.interval) {
@@ -240,8 +249,8 @@ export default {
                     self.hardware = data.hardware || 'N/A'
                     self.dcName = (data.dataCenter || {}).name || 'N/A'
                     self.dcLocation = (data.dataCenter || {}).location || 'N/A'
-                    self.website = data.website || ''
-                    self.telegram = data.telegram || ''
+                    self.website = (data.socials || {}).website || ''
+                    self.telegram = (data.socials || {}).telegram || ''
                 }
             }
         } catch (e) {
@@ -356,13 +365,8 @@ export default {
                     body.dcLocation = self.dcLocation
                 }
 
-                if (self.website !== '') {
-                    body.website = self.website
-                }
-
-                if (self.telegram !== '') {
-                    body.telegram = self.telegram
-                }
+                body.website = self.website
+                body.telegram = self.telegram
 
                 const { data } = await axios.put(
                     '/api/candidates/update',
diff --git a/app/components/candidates/View.vue b/app/components/candidates/View.vue
index 5be822ca..79e1b0af 100644
--- a/app/components/candidates/View.vue
+++ b/app/components/candidates/View.vue
@@ -31,7 +31,9 @@
                                     :key="key"
                                     class="list-inline-item social-links__item">
                                     <a
+                                        v-if="value !== ''"
                                         :href="value"
+                                        target="_blank"
                                         class="social-links__link">
                                         <i :class="'social-links__icon tm-' + key" />
                                     </a>
diff --git a/app/components/voters/EstimateReward.vue b/app/components/voters/EstimateReward.vue
index 9eb08417..9c299b38 100644
--- a/app/components/voters/EstimateReward.vue
+++ b/app/components/voters/EstimateReward.vue
@@ -2,7 +2,7 @@
     <div
         v-if="estimatedReward !== 'N/A'"
         class="float-left">
-        Est. Daily Reward: {{ estimatedReward }}
+        Est. Daily Reward: {{ estimatedReward }} TOMO
     </div>
 </template>
 <script>
@@ -43,7 +43,7 @@ export default {
             const query = self.serializeQuery(params)
             const { data } = await axios.get('/api/voters/calculatingReward1Day' + '?' + query)
 
-            self.estimatedReward = data !== 'N/A' ? data.toFixed(6) : data
+            self.estimatedReward = data !== 'N/A' ? data.toFixed(3) : data
         }
     }
 }