diff --git a/package.nix b/package.nix
index 46953aa..920a9fb 100644
--- a/package.nix
+++ b/package.nix
@@ -80,6 +80,7 @@
     gopls
     golangci-lint-langserver
     htmx-lsp
+    lemminx
     lua-language-server
     nil
     tailwindcss-language-server