diff --git a/manifest.json b/manifest.json
index 4d0301f..c172fcc 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,4 +1,5 @@
 {
+    "id": "/posimai-brief/",
     "name": "Posimai Brief",
     "short_name": "Brief",
     "description": "音声ニュースブリーフィング",