diff --git a/domains/tuanthu1.is-a-fullstack.json b/domains/TdoubleT.is-a-fullstack.dev.json
similarity index 89%
rename from domains/tuanthu1.is-a-fullstack.json
rename to domains/TdoubleT.is-a-fullstack.dev.json
index f2ce3752..d1a05c70 100644
--- a/domains/tuanthu1.is-a-fullstack.json
+++ b/domains/TdoubleT.is-a-fullstack.dev.json
@@ -1,6 +1,6 @@
 {
     "domain": "is-a-fullstack.dev",
-    "subdomain": "tuanthu1",
+    "subdomain": "TdoubleT",
 
     "owner": {
         "repo": "https://github.com/tuanthu1/tuanthu2",