diff --git a/rsconcept/frontend/package.json b/rsconcept/frontend/package.json
index b9b9d38d..e894aa38 100644
--- a/rsconcept/frontend/package.json
+++ b/rsconcept/frontend/package.json
@@ -9,7 +9,7 @@
     "dev": "vite --host",
     "build": "tsc && vite build",
     "lint": "eslint . --report-unused-disable-directives --max-warnings 0",
-    "preview": "vite preview"
+    "preview": "vite preview --port 3000"
   },
   "dependencies": {
     "@dagrejs/dagre": "^1.1.4",