diff --git a/config.yaml.dist b/config.yaml.dist
index 1436693..a623e34 100644
--- a/config.yaml.dist
+++ b/config.yaml.dist
@@ -36,7 +36,7 @@ limits:
     posts_per_page: 40
     max_comment_length: 5000
 
-tag_name_regex: ^[a-zA-Z0-9_:][a-zA-Z0-9_-]*$
+tag_name_regex: ^[a-zA-Z0-9_:()][a-zA-Z0-9_()-]*$
 tag_category_name_regex: ^.{1,}$
 
 default_rank: regular