diff --git a/scripts/upgrade b/scripts/upgrade
index 2d0e277..412f82e 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -90,7 +90,7 @@ then
 	ynh_script_progression --message="Upgrading source files..." --weight=1
 
 	# Download, check integrity, uncompress and patch the source from app.src
-	ynh_setup_source --dest_dir="$final_path" --keep="config/config.js"
+	ynh_setup_source --dest_dir="$final_path" --keep="config/config.js /customize"
 	
 	chmod 750 "$final_path"
 	chmod -R o-rwx "$final_path"