diff --git a/doc/highlight.js b/doc/highlight.js
index 2a184e9e82..af943fabea 100644
--- a/doc/highlight.js
+++ b/doc/highlight.js
@@ -1115,7 +1115,7 @@ hljs.registerLanguage("lean", function(hljs) {
       'import open export theory prelude renaming hiding exposing ' +
       'calc  match with do by let extends ' +
       'for in unless try catch finally mutual mut return continue break where rec ' +
-      'syntax macro_rules macro ' +
+      'syntax macro_rules macro deriving ' +
       'fun ' +
       '#check #check_failure #eval #reduce #print ' +
       'section namespace end infix infixl infixr postfix prefix ',
diff --git a/lean4-mode/lean4-syntax.el b/lean4-mode/lean4-syntax.el
index 439b516842..12343cbc85 100644
--- a/lean4-mode/lean4-syntax.el
+++ b/lean4-mode/lean4-syntax.el
@@ -20,7 +20,7 @@
     "try" "catch" "finally" "where" "rec" "mut" "forall" "fun"
     "exists" "if" "then" "else" "from" "init_quot" "return"
     "mutual" "def" "run_cmd" "declare_syntax_cat" "syntax" "macro_rules" "macro" "scoped"
-    "initialize" "builtin_initialize" "induction" "cases" "generalizing" "unif_hint")
+    "initialize" "builtin_initialize" "induction" "cases" "generalizing" "unif_hint" "deriving")
   "lean keywords ending with 'word' (not symbol)")
 (defconst lean4-keywords1-regexp
   (eval `(rx word-start (or ,@lean4-keywords1) word-end)))