diff --git a/domains/kosma.json b/domains/kosma.json
new file mode 100644
index 0000000000..f9fe1c3ff9
--- /dev/null
+++ b/domains/kosma.json
@@ -0,0 +1,8 @@
+{
+    "owner": {
+        "username": "KosmicznyNomad"
+    },
+    "records": {
+        "CNAME": "custom-domains.chatgpt.site"
+    }
+}