diff --git a/sherlock_project/resources/data.json b/sherlock_project/resources/data.json
index d3f44240cc..b9ffa94068 100644
--- a/sherlock_project/resources/data.json
+++ b/sherlock_project/resources/data.json
@@ -794,6 +794,7 @@
   },
   "Empretienda AR": {
     "__comment__": "Note that Error Connecting responses may be indicative of unclaimed handles",
+    "regexCheck": "^[\\w@-]+?$",
     "errorType": "status_code",
     "url": "https://{}.empretienda.com.ar",
     "urlMain": "https://empretienda.com",
@@ -2430,6 +2431,7 @@
     "username_claimed": "charlidamelio"
   },
   "Tiendanube": {
+    "regexCheck": "^[\\w@-]+?$",
     "url": "https://{}.mitiendanube.com/",
     "urlMain": "https://www.tiendanube.com/",
     "errorType": "status_code",
@@ -2493,6 +2495,7 @@
     "username_claimed": "user"
   },
   "tistory": {
+    "regexCheck": "^[\\w@-]+?$",
     "errorType": "status_code",
     "url": "https://{}.tistory.com/",
     "urlMain": "https://www.tistory.com/",
@@ -3235,6 +3238,7 @@
     "username_claimed": "adam"
   },
   "tumblr": {
+    "regexCheck": "^[\\w@-]+?$",
     "errorType": "status_code",
     "url": "https://{}.tumblr.com/",
     "urlMain": "https://www.tumblr.com/",