diff --git a/server/controllers/activitypub/inbox.ts b/server/controllers/activitypub/inbox.ts
index 20bd20ed4..738d155eb 100644
--- a/server/controllers/activitypub/inbox.ts
+++ b/server/controllers/activitypub/inbox.ts
@@ -7,6 +7,8 @@ import { asyncMiddleware, checkSignature, localAccountValidator, localVideoChann
 import { activityPubValidator } from '../../middlewares/validators/activitypub/activity'
 import { VideoChannelModel } from '../../models/video/video-channel'
 import { AccountModel } from '../../models/account/account'
+import { queue } from 'async'
+import { ActorModel } from '../../models/activitypub/actor'
 
 const inboxRouter = express.Router()
 
@@ -14,7 +16,7 @@ inboxRouter.post('/inbox',
   signatureValidator,
   asyncMiddleware(checkSignature),
   asyncMiddleware(activityPubValidator),
-  asyncMiddleware(inboxController)
+  inboxController
 )
 
 inboxRouter.post('/accounts/:name/inbox',
@@ -22,14 +24,14 @@ inboxRouter.post('/accounts/:name/inbox',
   asyncMiddleware(checkSignature),
   asyncMiddleware(localAccountValidator),
   asyncMiddleware(activityPubValidator),
-  asyncMiddleware(inboxController)
+  inboxController
 )
 inboxRouter.post('/video-channels/:name/inbox',
   signatureValidator,
   asyncMiddleware(checkSignature),
   asyncMiddleware(localVideoChannelValidator),
   asyncMiddleware(activityPubValidator),
-  asyncMiddleware(inboxController)
+  inboxController
 )
 
 // ---------------------------------------------------------------------------
@@ -40,7 +42,12 @@ export {
 
 // ---------------------------------------------------------------------------
 
-async function inboxController (req: express.Request, res: express.Response, next: express.NextFunction) {
+const inboxQueue = queue<{ activities: Activity[], signatureActor?: ActorModel, inboxActor?: ActorModel }, Error>((task, cb) => {
+  processActivities(task.activities, task.signatureActor, task.inboxActor)
+    .then(() => cb())
+})
+
+function inboxController (req: express.Request, res: express.Response, next: express.NextFunction) {
   const rootActivity: RootActivity = req.body
   let activities: Activity[] = []
 
@@ -66,7 +73,11 @@ async function inboxController (req: express.Request, res: express.Response, nex
 
   logger.info('Receiving inbox requests for %d activities by %s.', activities.length, res.locals.signature.actor.url)
 
-  await processActivities(activities, res.locals.signature.actor, accountOrChannel ? accountOrChannel.Actor : undefined)
+  inboxQueue.push({
+    activities,
+    signatureActor: res.locals.signature.actor,
+    inboxActor: accountOrChannel ? accountOrChannel.Actor : undefined
+  })
 
-  res.status(204).end()
+  return res.status(204).end()
 }