diff --git a/lib/filter/base.rb b/lib/filter/base.rb
index e2b3218ee..56a1d12c0 100644
--- a/lib/filter/base.rb
+++ b/lib/filter/base.rb
@@ -81,7 +81,7 @@ module BeEF
     # check for valid browser details chars
     def self.has_valid_browser_details_chars?(str)
       return false if not is_non_empty_string?(str)
-      not (str =~ /[^\w\d\s()-.,;:_\/\302\256]/).nil? # \302\256 is the (r) character 
+      not (str =~ /[^\w\d\s()-.,;:_\/!\302\256]/).nil? # \302\256 is the (r) character 
     end