diff --git a/app/workers/add_watermark_to_weather_art_worker.rb b/app/workers/add_watermark_to_weather_art_worker.rb
index ed166ac..9d57f9b 100644
--- a/app/workers/add_watermark_to_weather_art_worker.rb
+++ b/app/workers/add_watermark_to_weather_art_worker.rb
@@ -16,7 +16,7 @@ class AddWatermarkToWeatherArtWorker
   attr_reader :weather_art
 
   def add_watermark
-    return if weather_art.image_with_watermark.attached?
+    nil if weather_art.image_with_watermark.attached?
 
     # watermark_path = Rails.root.join("app/assets/images/today_ai_weather_copyright_watermark1.png")
     # return unless File.exist?(watermark_path)