diff --git a/data.json b/data.json
index 18b3fa8e..fc6207cc 100644
--- a/data.json
+++ b/data.json
@@ -391,10 +391,11 @@
     "errorType": "response_url",
     "errorUrl": "https://www.duolingo.com/errors/404.html",
     "rank": 564,
+    "regexCheck": "^[a-zA-Z0-9_-]{3,16}$",
     "url": "https://www.duolingo.com/{}",
     "urlMain": "https://www.duolingo.com/",
     "username_claimed": "blue",
-    "username_unclaimed": "noonewouldeverusethis7"
+    "username_unclaimed": "noonewoulduse"
   },
   "EVE Online": {
     "errorType": "response_url",