diff --git a/domains/portfolio.json b/domains/portfolio.json
new file mode 100644
index 0000000000..e55f924364
--- /dev/null
+++ b/domains/portfolio.json
@@ -0,0 +1,11 @@
+{
+  "owner": {
+    "username": "hanjungwoo3",
+    "email": "jwhan@cafe24corpai.com"
+  },
+  "description": "Official demo for portfolio-web — open-source Korean stock portfolio tracker",
+  "repo": "https://github.com/hanjungwoo3/portfolio-web",
+  "records": {
+    "CNAME": "hanjungwoo3.github.io"
+  }
+}