diff --git a/lib/models/user.ts b/lib/models/user.ts
index 69d08f19e..453379cf7 100644
--- a/lib/models/user.ts
+++ b/lib/models/user.ts
@@ -36,7 +36,7 @@ export type Profile = {
   id: string;
   username: string;
   displayName: string;
-  emails: any[];
+  emails: string[];
   avatarUrl: string;
   profileUrl: string;
   provider: ProviderEnum;
@@ -125,7 +125,7 @@ export class User extends Model<User> {
         }
         break
       case ProviderEnum.dropbox:
-        photo = generateAvatarURL('', profile.emails[0].value, bigger)
+        photo = generateAvatarURL('', profile.emails[0], bigger)
         break
       case ProviderEnum.google:
         photo = profile.photos[0].value
diff --git a/lib/web/auth/dropbox/index.ts b/lib/web/auth/dropbox/index.ts
index 1c6f5b72b..bf8db04a6 100644
--- a/lib/web/auth/dropbox/index.ts
+++ b/lib/web/auth/dropbox/index.ts
@@ -2,6 +2,7 @@ import { NextFunction, Request, Response, Router } from 'express'
 import passport from 'passport'
 import { Strategy as DropboxStrategy } from 'passport-dropbox-oauth2'
 import { config } from '../../../config'
+import { User } from '../../../models'
 import { AuthMiddleware } from '../interface'
 import { passportGeneralCallback } from '../utils'
 
@@ -14,7 +15,17 @@ export const DropboxMiddleware: AuthMiddleware = {
       clientID: config.dropbox.clientID,
       clientSecret: config.dropbox.clientSecret,
       callbackURL: config.serverURL + '/auth/dropbox/callback'
-    }, passportGeneralCallback))
+    }, (
+      accessToken: string,
+      refreshToken: string,
+      profile: any,
+      done: (err?: Error | null, user?: User) => void
+    ): void => {
+      // the Dropbox plugin wraps the email addresses in an object
+      // see https://github.com/florianheinemann/passport-dropbox-oauth2/blob/master/lib/passport-dropbox-oauth2/strategy.js#L146
+      profile.emails = profile.emails.map(element => element.value)
+      passportGeneralCallback(accessToken, refreshToken, profile, done)
+    }))
 
     dropboxAuth.get('/auth/dropbox', function (req: Request, res: Response, next: NextFunction) {
       passport.authenticate('dropbox-oauth2')(req, res, next)