diff --git a/superfluous-parentheses.el b/superfluous-parentheses.el
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+++ b/superfluous-parentheses.el
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+;;; superfluous-parentheses --- Emacs support for [] and {} in lisp-mode
+
+;;; Code:
+(defun superfluous-modify-font-lock-keywords (rule-table)
+  (dolist (rule rule-table)
+    (when (and (consp rule) (stringp (car rule)))
+     (when (string-prefix-p "(" (car rule))
+       (rplaca rule (concat "\\s(" (substring (car rule) 1)))))))
+
+(add-hook! lisp-mode
+  (modify-syntax-entry ?\[ "(]" lisp-mode-syntax-table)
+  (modify-syntax-entry ?\] ")[" lisp-mode-syntax-table)
+  (modify-syntax-entry ?\{ "(}" lisp-mode-syntax-table)
+  (modify-syntax-entry ?\} "){" lisp-mode-syntax-table)
+  (superfluous-modify-font-lock-keywords lisp-cl-font-lock-keywords-1)
+  (superfluous-modify-font-lock-keywords lisp-cl-font-lock-keywords-2)
+  (superfluous-modify-font-lock-keywords lisp-cl-font-lock-keywords))
+
+;;; Commentary:
+;; This package modifies the lisp-mode syntax table and font-lock keywords to
+;; provide proper support for using square brackets and curly braces in Common
+;; Lisp code, as per superfluous-parentheses.
+
+(provide 'superfluous-parentheses)
+;;; superfluous-parentheses.el ends here