diff --git a/druid/custom/rich_text/module/rt_parse.lua b/druid/custom/rich_text/module/rt_parse.lua
index 94de709..632380f 100755
--- a/druid/custom/rich_text/module/rt_parse.lua
+++ b/druid/custom/rich_text/module/rt_parse.lua
@@ -159,7 +159,7 @@ function M.parse(text, default_settings, style)
 		end
 
 		-- parse the tag, split into name and optional parameters
-		local endtag, name, params, empty = tag:match("<(/?)([%a_]+)=?(%S-)(/?)>")
+		local endtag, name, params, empty = tag:match("<(/?)([%w_]+)=?(%S-)(/?)>")
 
 		local is_endtag = endtag == "/"
 		local is_empty = empty == "/"