diff --git a/files/helpers/regex.py b/files/helpers/regex.py
index 7b5c892bc..59d3011b5 100644
--- a/files/helpers/regex.py
+++ b/files/helpers/regex.py
@@ -8,8 +8,8 @@ from .config.const import *
 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('@([a-zA-Z0-9_\-]{1,30})(?!([^<]*<\/(code|pre|a)>|[^`]*`))', flags=re.A)
-group_mention_regex = re.compile('!([a-z0-9_\-]{3,25})(?!([^<]*<\/(code|pre|a)>|[^`]*`))', flags=re.A|re.I)
+mention_regex = re.compile('(?<!\/)@([a-zA-Z0-9_\-]{1,30})(?!([^<]*<\/(code|pre|a)>|[^`]*`))', flags=re.A)
+group_mention_regex = re.compile('(?<!\/)!([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)