diff --git a/domains/misitio.json b/domains/misitio.json
deleted file mode 100644
index 1456d7a89b..0000000000
--- a/domains/misitio.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "owner": {
-    "username": "jose-grito"
-  },
-  "records": {
-    "CNAME": "castle-mixture-federation-expires.trycloudflare.com"
-  }
-}
diff --git a/util/disallowed-cnames.json b/util/disallowed-cnames.json
index b56bfb4ca7..b11b6f798f 100644
--- a/util/disallowed-cnames.json
+++ b/util/disallowed-cnames.json
@@ -1,4 +1,5 @@
 [
     ".cfargotunnel.com",
+    ".trycloudflare.com",
     ".workers.dev"
 ]