diff --git a/files/helpers/regex.py b/files/helpers/regex.py
index 0d59e5e724..b456b985c3 100644
--- a/files/helpers/regex.py
+++ b/files/helpers/regex.py
@@ -9,7 +9,7 @@ valid_username_chars = 'a-zA-Z0-9_\-'
 valid_username_regex = re.compile("^[a-zA-Z0-9_\-]{3,25}$", flags=re.A)
 mention_regex = re.compile('(^|\s|>)@([a-zA-Z0-9_\-]{1,30})(?!([^<]*<\/(code|pre|a)>|[^`]*`))', flags=re.A)
 
-group_mention_regex = re.compile('(^|\s|>)!([a-z0-9_\-]{3,25})(?!([^<]*<\/(code|pre|a)>|[^`]*`))', flags=re.A)
+group_mention_regex = re.compile('(^|\s|>)!([a-z0-9_\-]{3,25})(?!([^<]*<\/(code|pre|a)>|[^`]*`))', flags=re.A|re.I)
 
 everyone_regex = re.compile('(^|\s|>)!(everyone)(?!([^<]*<\/(code|pre|a)>|[^`]*`))', flags=re.A)
 
diff --git a/files/helpers/sanitize.py b/files/helpers/sanitize.py
index 342994f8e8..d0b0283189 100644
--- a/files/helpers/sanitize.py
+++ b/files/helpers/sanitize.py
@@ -391,7 +391,7 @@ def sanitize(sanitized, golden=True, limit_pings=0, showmore=True, count_marseys
 			else:
 				existing = g.db.get(Group, name)
 				if existing:
-					sanitized = sanitized.replace(i.group(0), f'{i.group(1)}<a href="/!{i.group(2)}">!{i.group(2)}</a>', 1)
+					sanitized = sanitized.replace(i.group(0), f'{i.group(1)}<a href="/!{name}">!{name}</a>', 1)
 
 	soup = BeautifulSoup(sanitized, 'lxml')