diff --git a/app/workers/snapshot_worker.rb b/app/workers/snapshot_worker.rb
index 56cc191..31ecc98 100644
--- a/app/workers/snapshot_worker.rb
+++ b/app/workers/snapshot_worker.rb
@@ -80,6 +80,6 @@ class SnapshotWorker
       @in_timing_path,
       @out_data_path,
       @out_timing_path
-    ])
+    ].compact)
   end
 end