diff --git a/fargo/settings.py b/fargo/settings.py
index db8cae5..09c8096 100644
--- a/fargo/settings.py
+++ b/fargo/settings.py
@@ -234,7 +234,9 @@ LOGGING = {
 
 INCLUDE_EDIT_LINK = False
 
+# from solr.thumbnail -- https://sorl-thumbnail.readthedocs.io/en/latest/reference/settings.html
 THUMBNAIL_ENGINE = 'sorl.thumbnail.engines.convert_engine.Engine'
+THUMBNAIL_FORCE_OVERWRITE = False
 
 FARGO_CODE_LIFETIME = 300
 FARGO_ACCESS_TOKEN_LIFETIME = 3600