diff --git a/package.json b/package.json
index 5a07df1..373c0d0 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
   },
   "devDependencies": {
     "@quasar/app": "^2.1.8",
+    "@quasar/quasar-app-extension-qcalendar": "^3.3.4",
     "@types/node": "^12.19.6",
     "@types/webpack": "^4.41.25",
     "@types/webpack-env": "^1.16.0",