diff --git a/scripts/upgrade b/scripts/upgrade
index 2deec49..5284d7a 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -54,7 +54,7 @@ if [ ~"$app" != "$data_dir" ]; then
 fi
 
 # Ensure secrets are defined
-ynh_setup_source --dest_dir="$install_dir" --source_id=main --full_replace=1
+ynh_setup_source --dest_dir="$install_dir" --source_id=main --full_replace=1 --keep=custom
 
 #=================================================
 # MIGRATION STEP 2 (Set undefined Vars)