diff --git a/zre-mode.el b/zre-mode.el
index e8c37b6..7291e3a 100644
--- a/zre-mode.el
+++ b/zre-mode.el
@@ -1,12 +1,26 @@
 ;;; zre-mode.el --- Major mode for editing Zre code -*- lexical-binding: t; -*-
-;;
-;; Licensed under the GPLv3 License.
+;; Copyright (C) 2025 zongor
+;;  
+;; This program is free software: you can redistribute it and/or modify  
+;; it under the terms of the GNU General Public License as published by  
+;; the Free Software Foundation, either version 3 of the License, or  
+;; (at your option) any later version.  
+;;  
+;; This program is distributed in the hope that it will be useful,  
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of  
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  
+;; GNU General Public License for more details.  
+;;  
+;; You should have received a copy of the GNU General Public License  
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.  
+;;;  
 
 (defvar zre-keywords
-  '("fn" "to" "in" "is" "as" "use" "if" "else"
-    "for" "try" "catch" "while" "do" "exit"
-    "return" "const" "type" "this" "yield"
-    "break" "mod" "not" "and" "or" "print" "let")
+  '("fn" "to" "in" "is" "as" "use" "if" "else" "default"
+    "for" "try" "catch" "while" "do" "exit" "switch" 
+    "return" "const" "type" "this" "yield" "case"
+    "assert" "break" "mod" "not" "and" "or" "print" "let"
+    "band" "bor" "bxor" "srl" "sll")
   "Keywords in Zre.")
 
 (defvar zre-types
@@ -53,16 +67,13 @@
     ("`[^`]*`" . font-lock-string-face))
 
   "Font lock keywords for Zre mode.")
+
 (defvar zre-mode-syntax-table
   (let ((st (make-syntax-table)))
-    ;; C++-style comments
-    (modify-syntax-entry ?/ ". 14b" st)
-    ;; C-style comments
+    (modify-syntax-entry ?/ ". 124" st)
     (modify-syntax-entry ?* ". 23" st)
-    ;; Strings
     (modify-syntax-entry ?\" "\"" st)
-    (modify-syntax-entry ?` "\"" st)
-    st)
+    (modify-syntax-entry ?` "\"" st))
   "Syntax table for Zre mode.")
 
 (define-derived-mode zre-mode prog-mode "Zre"