diff --git a/subdomains.json b/subdomains.json
index 404a57af..a45c6439 100644
--- a/subdomains.json
+++ b/subdomains.json
@@ -75,6 +75,7 @@
   "duckinc": "0e139846-5714-4001-a085-6fe24b982068.id.repl.co",
   "dvd": "arnon001.github.io/dvd",
   "edrea": "edrea.netlify.app",
+  "er": "ernewdev0.github.io",
   "egktools": "eungangku.github.io/EGKTools",
   "elijah629": "elijah629.vercel.app",
   "elvisvictor": "elvisndubuisi.vercel.app",