diff --git a/README.md b/README.md
index 9b25d1504..8096aea40 100644
--- a/README.md
+++ b/README.md
@@ -384,6 +384,7 @@ List of currently supported languages:
 - [ ] [markdown](https://github.com/ikatyang/tree-sitter-markdown)
 - [ ] [nix](https://github.com/cstrahan/tree-sitter-nix)
 - [x] [ocaml](https://github.com/tree-sitter/tree-sitter-ocaml) (maintained by @undu)
+- [x] [ocaml_interface](https://github.com/tree-sitter/tree-sitter-ocaml) (maintained by @undu)
 - [x] [php](https://github.com/tree-sitter/tree-sitter-php) (maintained by @tk-shirasaka)
 - [x] [python](https://github.com/tree-sitter/tree-sitter-python) (maintained by @stsewd, @theHamsta)
 - [x] [Tree-sitter query language](https://github.com/nvim-treesitter/tree-sitter-query) (maintained by @steelsojka)