diff --git a/packages/city-data/tsconfig.json b/packages/city-data/tsconfig.json
index b97cd3e8..32b7fecc 100644
--- a/packages/city-data/tsconfig.json
+++ b/packages/city-data/tsconfig.json
@@ -3,6 +3,6 @@
   "compilerOptions": {
     "tsBuildInfoFile": "node_modules/.cache/tsbuildinfo.json"
   },
-  "include": ["src", "../../reset.d.ts"],
+  "include": ["src", "../../reset.d.ts", "src/**/*.mjs"],
   "exclude": ["node_modules"]
 }