diff --git a/packages/demo-protobuf/tsconfig.json b/packages/demo-protobuf/tsconfig.json
index 167e8c02..996a40f8 100644
--- a/packages/demo-protobuf/tsconfig.json
+++ b/packages/demo-protobuf/tsconfig.json
@@ -4,9 +4,8 @@
     "baseUrl": ".",
     "outDir": "build",
     "declarationDir": "build/types",
+    "experimentalDecorators": true,
     "rootDir": "src"
   },
-  "include": [
-    "src/**/*"
-  ]
+  "include": ["src/**/*"]
 }