diff --git a/package-lock.json b/package-lock.json
index 58bb3992..e60cb235 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8271,8 +8271,9 @@
       }
     },
     "nedb-promises": {
-      "version": "git://github.com/bajankristof/nedb-promises.git#bbc45f51d1cdcb6a38fb640b11429490816b320e",
-      "from": "git://github.com/bajankristof/nedb-promises.git#bbc45f5",
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/nedb-promises/-/nedb-promises-3.0.5.tgz",
+      "integrity": "sha512-ikrcn1lXTZhuiLG+LZnYfMPxAHECsy8kUqqZ0fQVFlXlpuXQROYSRDG8+AmkAX6N0tZY+tY8P/vEsW4+eFScUA==",
       "dev": true,
       "requires": {
         "nedb": "^1.8.0"
diff --git a/package.json b/package.json
index b3f3091a..ddda2adf 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "eslint": "^5.8.0",
     "eslint-plugin-vue": "^5.0.0",
     "megalodon": "^0.6.4",
-    "nedb-promises": "git://github.com/bajankristof/nedb-promises.git#bbc45f5",
+    "nedb-promises": "^3.0.5",
     "postcss-nested": "^4.1.2",
     "typescript": "^3.4.3",
     "vue-cli-plugin-electron-builder": "^1.3.1",
diff --git a/src/main/Auth.ts b/src/main/Auth.ts
index 4909c5be..424487d6 100644
--- a/src/main/Auth.ts
+++ b/src/main/Auth.ts
@@ -1,12 +1,11 @@
 import { ipcMain, Event, shell, app } from "electron"
 import Mastodon, { Response, Account, OAuth } from "megalodon"
 import { join } from "path"
-import Datastore from "nedb"
+import Datastore from "nedb-promises"
 
 import Client from "./Client"
 
 interface AccountDoc {
-  _id?: string
   domain: string
   acct: string
   full: string
@@ -100,7 +99,7 @@ export default class Auth {
     let resp: Response<Account> = await client.get<Account>("/accounts/verify_credentials")
     let you = resp.data
 
-    let db = new Datastore({
+    let db = Datastore.create({
       filename: join(app.getPath("userData"), "account.db"),
       autoload: true
     })
@@ -114,16 +113,15 @@ export default class Auth {
       accessToken: tokenData.accessToken,
     }
 
-    db.insert(docs, function (err, newDocs) {
-      if (err) {
-        event.sender.send(`error`, {
-          id: "ERROR_YOU_TRY_ANOTHER_ACCOUNT",
-          message: "You cannot login already logined account."
-        })
-      } else {
-        Client.setAuthClient('http', newDocs.full, client)
-        event.sender.send(`login-complete`, newDocs)
-      }
-    })
+    try {
+      let newDoc = await db.insert(docs)
+      Client.setAuthClient('http', newDoc.full, client)
+      event.sender.send(`login-complete`, newDoc)
+    } catch (error) {
+      event.sender.send(`error`, {
+        id: "ERROR_YOU_TRY_ANOTHER_ACCOUNT",
+        message: "You cannot login already logined account."
+      })
+    }
   }
 }
diff --git a/src/main/Client.ts b/src/main/Client.ts
index 18cd059b..d640dbfd 100644
--- a/src/main/Client.ts
+++ b/src/main/Client.ts
@@ -19,7 +19,7 @@ export default class Client {
 
         if (!clients.has(username)) {
             // usernameからドメインをとトークンをデータベースから取得してクライアントを作る
-            let db = new Datastore({
+            let db = Datastore.create({
                 filename: join(app.getPath("userData"), "account.db"),
                 autoload: true
             })
diff --git a/src/main/Timeline.ts b/src/main/Timeline.ts
index 6f2210df..8c11fa85 100644
--- a/src/main/Timeline.ts
+++ b/src/main/Timeline.ts
@@ -39,7 +39,7 @@ export default class Timeline {
             return
         }
 
-        let db = new Datastore({
+        let db = Datastore.create({
             filename: join(app.getPath("userData"), "timeline.db"),
             autoload: true
         })