diff --git a/iOS/AppDelegate.swift b/iOS/AppDelegate.swift
index ac62fb6d0..5d4d694fa 100644
--- a/iOS/AppDelegate.swift
+++ b/iOS/AppDelegate.swift
@@ -365,7 +365,9 @@ private extension AppDelegate {
 					
 		// set expiration handler
 		task.expirationHandler = { [weak task] in
-			self.suspendApplication()
+			DispatchQueue.main.sync {
+				self.suspendApplication()
+			}
 			os_log("Accounts refresh processing terminated for running too long.", log: self.log, type: .info)
 			task?.setTaskCompleted(success: false)
 		}