diff --git a/files/helpers/regex.py b/files/helpers/regex.py
index 70ebbd0c0..cbb9ad999 100644
--- a/files/helpers/regex.py
+++ b/files/helpers/regex.py
@@ -43,7 +43,7 @@ sub_regex = re.compile('(^|\s|<p>)\/?(h\/(\w|-){3,25})(?![^<]*<\/(code|pre|a)>)'
 
 strikethrough_regex = re.compile('(^|\s|>)~{1,2}([^~]+)~{1,2}', flags=re.A)
 
-mute_regex = re.compile("/mute @([a-z0-9_\-]{3,25}) ([0-9])+", flags=re.A)
+mute_regex = re.compile("\/mute @([a-z0-9_\-]{3,25}) ([0-9])+", flags=re.A|re.I)
 
 emoji_regex = re.compile(f"<p>\s*(:[!#@]{{0,3}}[{valid_username_chars}]+:\s*)+<\/p>", flags=re.A)
 emoji_regex2 = re.compile(f'(?<!"):([!#@{valid_username_chars}]{{1,36}}?):', flags=re.A)
diff --git a/files/routes/chat.py b/files/routes/chat.py
index 86b60a05e..d3e702088 100644
--- a/files/routes/chat.py
+++ b/files/routes/chat.py
@@ -79,7 +79,7 @@ def speak(data, v):
 	if v.admin_level > 1:
 		text = text.lower()
 		for i in mute_regex.finditer(text):
-			username = i.group(1)
+			username = i.group(1).lower()
 			duration = int(int(i.group(2)) * 60 + time.time())
 			muted[username] = duration