diff --git a/CHANGES.md b/CHANGES.md
index f96676fa3b..b5ef1add32 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -15,11 +15,12 @@ Grammars:
 New Languages:
 
 - Added 3rd party X# grammar to SUPPORTED_LANGUAGES [Patrick Kruselburger][]
+- Added 3rd party MKB grammar to SUPPORTED_LANGUAGES (#3297) [Dereavy][]
 
 [Josh Goebel]: https://github.com/joshgoebel
 [Patrick Kruselburger]: https://github.com/PatrickKru
 [Bradley Mackey]: https://github.com/bradleymackey
-
+[Dereavy]: https://github.com/dereavy
 
 ## Version 11.1.0
 
diff --git a/SUPPORTED_LANGUAGES.md b/SUPPORTED_LANGUAGES.md
index c4fca1e05e..876cba772a 100644
--- a/SUPPORTED_LANGUAGES.md
+++ b/SUPPORTED_LANGUAGES.md
@@ -121,6 +121,7 @@ The table below shows the full list of languages (and corresponding classes/alia
 | Mercury                 | mercury                |         |
 | mIRC Scripting Language | mirc, mrc              | [highlightjs-mirc](https://github.com/highlightjs/highlightjs-mirc) |
 | Mizar                   | mizar                  |         |
+| MKB                     | mkb                    | [highlightjs-mkb](https://github.com/Dereavy/highlightjs-mkb) |
 | Mojolicious             | mojolicious            |         |
 | Monkey                  | monkey                 |         |
 | Moonscript              | moonscript, moon       |         |