diff --git a/app/workers/aggregation_completed_mailer_worker.rb b/app/workers/aggregation_completed_mailer_worker.rb
index 0aa1ab171..2019df20d 100644
--- a/app/workers/aggregation_completed_mailer_worker.rb
+++ b/app/workers/aggregation_completed_mailer_worker.rb
@@ -7,6 +7,6 @@ class AggregationCompletedMailerWorker
 
   def perform(agg_id)
     aggregation = Aggregation.find(agg_id)
-    AggregationCompletedMailer.aggregation_complete(aggregation).deliver
+    AggregationCompletedMailer.aggregation_complete(aggregation).deliver_now
   end
 end