diff --git a/app/helpers/mention_helper.rb b/app/helpers/mention_helper.rb
index 5f00454..2d28b5a 100644
--- a/app/helpers/mention_helper.rb
+++ b/app/helpers/mention_helper.rb
@@ -1,6 +1,6 @@
 module MentionHelper
   def mention_search_regex
-    /(?:^\s?|\s)@([^\s]+)/m
+    /(?:^\s?|\s)@([^\s?:^\.]+)/m
   end
 
   def has_mentions? text=""
--
libgit2 0.21.2