diff --git a/frontend/package.json b/frontend/package.json
index a3a68fb..b8a8888 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -9,10 +9,11 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "@fullcalendar/daygrid": "^6.1.15",
-    "@fullcalendar/interaction": "^6.1.15",
-    "@fullcalendar/react": "^6.1.15",
-    "@fullcalendar/timegrid": "^6.1.15",
+    "@fullcalendar/core": "6.1.15",
+    "@fullcalendar/daygrid": "6.1.15",
+    "@fullcalendar/interaction": "6.1.15",
+    "@fullcalendar/react": "6.1.15",
+    "@fullcalendar/timegrid": "6.1.15",
     "axios": "^1.7.9",
     "date-fns": "^3.6.0",
     "react": "^18.3.1",
diff --git a/frontend/vite.config.js b/frontend/vite.config.js
index 04e9bde..9e5cfdb 100644
--- a/frontend/vite.config.js
+++ b/frontend/vite.config.js
@@ -3,6 +3,15 @@ import react from '@vitejs/plugin-react'
 
 export default defineConfig({
   plugins: [react()],
+  optimizeDeps: {
+    include: [
+      '@fullcalendar/core',
+      '@fullcalendar/react',
+      '@fullcalendar/daygrid',
+      '@fullcalendar/timegrid',
+      '@fullcalendar/interaction',
+    ],
+  },
   server: {
     proxy: {
       '/api': {