diff --git a/sherlock/resources/data.json b/sherlock/resources/data.json
index 4ff705b..75450f4 100644
--- a/sherlock/resources/data.json
+++ b/sherlock/resources/data.json
@@ -93,6 +93,7 @@
   "LinkedIn": {
     "url": "https://linkedin.com/in/{}",
     "urlMain": "https://linkedin.com",
+    "regexCheck": "^[a-zA-Z0-9]{3,100}$",
     "request_method": "GET",
     "errorType": "status_code",
     "headers": {