diff --git a/backend/server.scala b/backend/server.scala
index 8e32513..9a3daee 100644
--- a/backend/server.scala
+++ b/backend/server.scala
@@ -315,7 +315,7 @@ def createJob(attrs: JobAttributes): (UUID, Job) =
         Fitness(fitness(attrs.file, _))
       ),
       events = handler,
-      evaluator = SequentialEvaluator
+      evaluator = ParallelCollectionsEvaluator
     ).train()
 
   id -> job