diff --git a/internal_packages/thread-snooze/package.json b/internal_packages/thread-snooze/package.json
index 3778ba4b2..83c674f37 100644
--- a/internal_packages/thread-snooze/package.json
+++ b/internal_packages/thread-snooze/package.json
@@ -9,7 +9,7 @@
 
   "title": "Thread Snooze",
   "description": "Snooze mail!",
-  "main": "lib/main.js",
+  "main": "lib/main",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },