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