diff --git a/scripts/upgrade b/scripts/upgrade
index 0803874..dc83152 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -220,7 +220,7 @@ then
 
 	# Perform migrations and clear cache
 	pushd $final_path
-		exec_as $app ynh_composer_exec --phpversion=$php_version --workdir=$final_path \
+		ynh_composer_exec --user=$app --phpversion=$php_version --workdir=$final_path \
 			--commands="update --prefer-dist --no-dev -a --with-all-dependencies"
 		exec_as $app php$php_version flarum migrate
 		exec_as $app php$php_version flarum cache:clear