diff --git a/scripts/upgrade b/scripts/upgrade
index e6976b3..5b8ec62 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -72,6 +72,8 @@ ynh_script_progression --message="Configuring the app..." --weight=15
 
 pushd $install_dir
 	ynh_use_nodejs
+	rm .cache/yarn/* -rf
+	rm node_modules -rf
 	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install --production
 	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn build
 	#ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn update-db