diff --git a/scripts/upgrade b/scripts/upgrade
index 0d64e3e..dc4abe5 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -113,7 +113,7 @@ then
 
 	pushd "$final_path"
 		ynh_use_nodejs
-		ynh_exec_warn_less ynh_npm install
+		ynh_exec_warn_less $ynh_npm install
 	popd
 fi