diff --git a/database/Seeders/eggs/rust/egg-rust.json b/database/Seeders/eggs/rust/egg-rust.json
index 0172146ff..8f6f82867 100644
--- a/database/Seeders/eggs/rust/egg-rust.json
+++ b/database/Seeders/eggs/rust/egg-rust.json
@@ -121,7 +121,7 @@
             "default_value": "CHANGEME",
             "user_viewable": true,
             "user_editable": true,
-            "rules": "required|string|max:64"
+            "rules": "required|regex:\/^[a-zA-Z0-9_.-]*$\/|max:64"
         },
         {
             "name": "Save Interval",
@@ -160,4 +160,4 @@
             "rules": "nullable|url"
         }
     ]
-}
\ No newline at end of file
+}