diff --git a/neovim/dev.nix b/neovim/dev.nix
index b503da9..e589f5d 100644
--- a/neovim/dev.nix
+++ b/neovim/dev.nix
@@ -1,4 +1,4 @@
-{ config, modulesPath, lib, ... }:
+{ config, modulesPath, lib, pkgs, ... }:
 
 let
   inherit (lib.mod) ctrl;
@@ -57,6 +57,22 @@ in
     })
   ];
 
+  plugins.style.nvim-treesitter.extraGrammars = {
+    tree-sitter-d2 = rec {
+      language = "d2";
+      version = "8a9d50043d58eedf1e375b0e2059e43efd856902";
+      # version = "e7507ddd983427cb71b4bd96b039c382c73d65c5";
+      src = pkgs.fetchFromGitea {
+        domain = "git.pleshevski.ru";
+        owner = "pleshevskiy";
+        repo = "tree-sitter-d2";
+        rev = version;
+        sha256 = "sha256-ZhVjxo7Xi7DaHN3qabUcykflY74bUqPcOA410fA3zRk=";
+        # sha256 = "sha256-m7ZCxnW4Q1bQp1GhntUF7l+p6DV1p/2AJXhVeRy8Rec=";
+      };
+    };
+  };
+
   plugins.style.neoformat.autoformat.enable = true;
 
   plugins.navigation = {