diff --git a/package.json b/package.json
index 99a672e63..d3bfc27cf 100644
--- a/package.json
+++ b/package.json
@@ -1,8 +1,8 @@
 {
 	"name": "misskey",
 	"author": "syuilo <i@syuilo.com>",
-	"version": "8.3.0",
-	"clientVersion": "1.0.8825",
+	"version": "8.3.1",
+	"clientVersion": "1.0.8828",
 	"codename": "nighthike",
 	"main": "./built/index.js",
 	"private": true,
@@ -150,6 +150,7 @@
 		"loader-utils": "1.1.0",
 		"lodash.assign": "4.2.0",
 		"mecab-async": "0.1.2",
+		"merge-options": "1.0.1",
 		"minio": "7.0.0",
 		"mkdirp": "0.5.1",
 		"mocha": "5.2.0",
diff --git a/src/client/app/desktop/views/pages/admin/admin.chart.chart.ts b/src/client/app/desktop/views/pages/admin/admin.chart.chart.ts
index d79b0ba19..c09dc6dd8 100644
--- a/src/client/app/desktop/views/pages/admin/admin.chart.chart.ts
+++ b/src/client/app/desktop/views/pages/admin/admin.chart.chart.ts
@@ -1,5 +1,6 @@
 import Vue from 'vue';
 import { Line } from 'vue-chartjs';
+import * as mergeOptions from 'merge-options';
 
 export default Vue.extend({
 	extends: Line,
@@ -21,7 +22,7 @@ export default Vue.extend({
 	},
 	methods: {
 		render() {
-			this.renderChart(this.data, Object.assign({
+			this.renderChart(this.data, mergeOptions({
 				responsive: false,
 				scales: {
 					xAxes: [{
diff --git a/src/client/app/desktop/views/pages/admin/admin.chart.vue b/src/client/app/desktop/views/pages/admin/admin.chart.vue
index 4e0050e8b..8db54174f 100644
--- a/src/client/app/desktop/views/pages/admin/admin.chart.vue
+++ b/src/client/app/desktop/views/pages/admin/admin.chart.vue
@@ -173,7 +173,7 @@ export default Vue.extend({
 		driveChart(local: boolean, total: boolean): any {
 			const data = this.stats.slice().reverse().map(x => ({
 				date: new Date(x.date),
-				count: local ?
+				size: local ?
 					total ? x.drive.local.totalSize : x.drive.local.diffSize :
 					total ? x.drive.remote.totalSize : x.drive.remote.diffSize
 			}));
@@ -186,7 +186,7 @@ export default Vue.extend({
 					borderWidth: 2,
 					pointBackgroundColor: '#fff',
 					lineTension: 0,
-					data: data.map(x => ({ t: x.date, y: x.count }))
+					data: data.map(x => ({ t: x.date, y: x.size }))
 				}]
 			}, {
 				scales: {