diff --git a/lua/plugins/lsp.lua b/lua/plugins/lsp.lua
index efc6842..35c4383 100644
--- a/lua/plugins/lsp.lua
+++ b/lua/plugins/lsp.lua
@@ -36,9 +36,15 @@ return {
       vim.lsp.config("rust_analyzer", {})
       vim.lsp.enable("rust_analyzer")
 
+      -- Haskell
+      vim.lsp.config('hls', {
+        filetypes = { 'haskell', 'lhaskell', 'cabal' },
+      })
+      vim.lsp.enable('hls')
+
       -- Auto format
       vim.api.nvim_create_autocmd("BufWritePre", {
-        pattern = "*.rs",
+        pattern = {"*.rs", "*.hs"},
         callback = function()
           vim.lsp.buf.format({ async = false })
         end,