diff --git a/home/packages/helix/default.nix b/home/packages/helix/default.nix
index f7ac284..6120fa5 100644
--- a/home/packages/helix/default.nix
+++ b/home/packages/helix/default.nix
@@ -1,4 +1,7 @@
 { pkgs, ... }:
+let
+  tree-sitter-url = "https://raw.githubusercontent.com/nvim-treesitter/nvim-treesitter/692b051b09935653befdb8f7ba8afdb640adf17b/runtime/queries/menhir/";
+in
 {
   programs.helix = {
     enable = true;
@@ -31,6 +34,13 @@
         environment.RUST_LOG = "info,simple-completion-language-server=info";
         environment.LOG_FILE = "/tmp/completion.log";
       };
+      language-server.ocamllsp = {
+        command = "ocamllsp";
+        args = [ "--fallback-read-dot-merlin" ];
+      };
+      language-server.menhir-lsp = {
+        command = "menhir-lsp";
+      };
       language = [
         {
           name = "typst";
@@ -39,6 +49,24 @@
             "scls"
           ];
         }
+        {
+          name = "menhir";
+          file-types = [ "mly" ];
+          language-servers = [
+            "menhir-lsp"
+            "ocamllsp"
+          ];
+          scope = "source.menhir";
+        }
+      ];
+      grammar = [
+        {
+          name = "menhir";
+          source = {
+            git = "https://github.com/Kerl13/tree-sitter-menhir";
+            rev = "be8866a6bcc2b563ab0de895af69daeffa88fe70";
+          };
+        }
       ];
     };
     extraPackages = with pkgs; [
@@ -52,4 +80,18 @@
     target = ".config/helix/unicode-input/base.toml";
     source = ./base.toml;
   };
+  home.file.helix-menhir-queries-highlights = {
+    target = ".config/helix/runtime/queries/menhir/highlights.scm";
+    source = pkgs.fetchurl {
+      url = tree-sitter-url + "highlights.scm";
+      sha256 = "1pgn6prbday0vf82g27l01233ng7i5h95vmijs65r7ynb021grkl";
+    };
+  };
+  home.file.helix-menhir-queries-injections = {
+    target = ".config/helix/runtime/queries/menhir/injections.scm";
+    source = pkgs.fetchurl {
+      url = tree-sitter-url + "injections.scm";
+      sha256 = "1m29zbrgrk29imha6lpn7an2c4198fi1a8l1q85ibnp5y8ds0v5v";
+    };
+  };
 }