diff --git a/apps/establishment/management/commands/establishment_optimize_preview_image.py b/apps/establishment/management/commands/establishment_optimize_preview_image.py
index cbb02b37..7ab53a33 100644
--- a/apps/establishment/management/commands/establishment_optimize_preview_image.py
+++ b/apps/establishment/management/commands/establishment_optimize_preview_image.py
@@ -30,6 +30,6 @@ class Command(BaseCommand):
                     establishment.preview_image_url = get_thumbnail(
                         file_=establishment.preview_image_url,
                         **sorl_settings,
-                        format='PNG' if file_ext[1:] == 'png' else 'JPEG'
+                        format='JPEG' if file_ext[1:] == 'jpg' else 'PNG'
                     ).url
                     establishment.save()