diff --git a/packages/react-calendar/tsconfig.json b/packages/react-calendar/tsconfig.json
index 1d4aa332..1bca9149 100644
--- a/packages/react-calendar/tsconfig.json
+++ b/packages/react-calendar/tsconfig.json
@@ -2,6 +2,7 @@
   "compilerOptions": {
     "declaration": true,
     "esModuleInterop": true,
+    "isolatedDeclarations": true,
     "isolatedModules": true,
     "jsx": "react-jsx",
     "module": "nodenext",