diff --git a/scripts/upgrade b/scripts/upgrade
index f3c5540..28f151f 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -39,7 +39,7 @@ ynh_npm install --global yarn
 ynh_script_progression --message="Setting up source files..." --weight=1
 
 # Download, check integrity, uncompress and patch the source from app.src
-ynh_setup_source --dest_dir="$install_dir"
+ynh_setup_source --dest_dir="$install_dir" --keep="config"
 
 chmod 750 "$install_dir"
 chmod -R o-rwx "$install_dir"