diff --git a/domains/_github-pages-challenge-LightHostingFree.lightarea.is-cool.dev.json b/domains/_github-pages-challenge-LightHostingFree.lightarea.is-cool.dev.json
index 834f7910..5ecde67c 100644
--- a/domains/_github-pages-challenge-LightHostingFree.lightarea.is-cool.dev.json
+++ b/domains/_github-pages-challenge-LightHostingFree.lightarea.is-cool.dev.json
@@ -2,7 +2,7 @@
     "description": "github verification",
 
     "domain": "is-cool.dev",
-    "subdomain": "__github-pages-challenge-LightHostingFree.lightarea",
+    "subdomain": "_github-pages-challenge-LightHostingFree.lightarea",
 
     "owner": {
         "repo": "https://github.com/LightHostingFree/LightArea",