diff --git a/CHANGES.md b/CHANGES.md
index b1413c29a5..4d695a8975 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -14,6 +14,7 @@ New Grammars:
 - added 3rd party L4 grammar to SUPPORTED_LANGUAGES [Thomas Gorissen][]
 - added 3rd party Bicep grammar to SUPPORTED_LANGUAGES [Anthony Martin][]
 - added 3rd party Abc Notation grammar to SUPPORTED_LANGUAGES [NriotHrreion][]
+- added 3rd party Pkl grammar to SUPPORTED_LANGUAGES [Dan Chao][]
 
 Core Grammars:
 
@@ -55,6 +56,7 @@ CONTRIBUTORS
 [te-ing]: https://github.com/te-ing
 [Anthony Martin]: https://github.com/anthony-c-martin
 [NriotHrreion]: https://github.com/NriotHrreion
+[Dan Chao]: https://github.com/bioball
 
 
 ## Version 11.11.1
diff --git a/SUPPORTED_LANGUAGES.md b/SUPPORTED_LANGUAGES.md
index c0a9ae6e58..f101e6baf2 100644
--- a/SUPPORTED_LANGUAGES.md
+++ b/SUPPORTED_LANGUAGES.md
@@ -181,6 +181,7 @@ The table below shows the full list of languages (and corresponding classes/alia
 | Phix                    | phix                   | [highlightjs-phix](https://github.com/highlightjs/highlightjs-phix) |
 | PHP                     | php                    |         |
 | Pine Script             | pine, pinescript       | [highlightjs-pine](https://github.com/jeyllani/highlightjs-pine) |
+| Pkl                     | pkl                    | [highlightjs-pkl](https://github.com/apple/highlightjs-pkl) |
 | Plaintext               | plaintext, txt, text   |         |
 | Pony                    | pony                   |         |
 | PostgreSQL & PL/pgSQL   | pgsql, postgres, postgresql |    |