diff --git a/apps/assets/serializers/asset.py b/apps/assets/serializers/asset.py
index 008816ee5..c53b3057d 100644
--- a/apps/assets/serializers/asset.py
+++ b/apps/assets/serializers/asset.py
@@ -94,7 +94,7 @@ class AssetSerializer(BulkOrgResourceModelSerializer):
 
     @staticmethod
     def validate_hostname(hostname):
-        pattern = r"^[\._@a-zA-Z0-9-\u4e00-\u9fa5]+$"
+        pattern = r"^[\._@\w-]+$"
         res = re.match(pattern, hostname)
         if res is None:
             msg = _("* The hostname contains characters that are not allowed")