1 files changed, 2 insertions, 1 deletions

diff --git a/server/lib/schedulers/abstract-scheduler.ts b/server/lib/schedulers/abstract-scheduler.ts
index 86ea7aa38..0e6088911 100644
--- a/server/lib/schedulers/abstract-scheduler.ts
+++ b/server/lib/schedulers/abstract-scheduler.ts
@@ -1,4 +1,5 @@
 import { logger } from '../../helpers/logger'
+import * as Bluebird from 'bluebird'
 
 export abstract class AbstractScheduler {
 
@@ -30,5 +31,5 @@ export abstract class AbstractScheduler {
     }
   }
 
-  protected abstract internalExecute (): Promise<any>
+  protected abstract internalExecute (): Promise<any> | Bluebird<any>
 }