diff --git a/includes/formatting.php b/includes/formatting.php
index 56e2ae4e..0880e47d 100644
--- a/includes/formatting.php
+++ b/includes/formatting.php
@@ -339,6 +339,8 @@ function wpcf7_is_email_in_site_domain( $email ) {
 
 function wpcf7_antiscript_file_name( $filename ) {
 	$filename = wp_basename( $filename );
+	$filename = preg_replace( '/[\pC\pZ]+/i', '', $filename );
+
 	$parts = explode( '.', $filename );
 
 	if ( count( $parts ) < 2 ) {