diff --git a/cod-astro/theme01/package.json b/cod-astro/theme01/package.json
index bd2bd33..f654243 100644
--- a/cod-astro/theme01/package.json
+++ b/cod-astro/theme01/package.json
@@ -31,7 +31,7 @@
     "happy-dom": "^20.9.0",
     "tailwindcss": "^4.0.0",
     "typescript": "^7.0.2",
-    "vitest": "^4.1.11",
+    "vitest": "^5.0.0",
     "wrangler": "^4.125.0"
   }
 }