diff --git a/lua/custom/autocmds.lua b/lua/custom/autocmds.lua
index fa72636..0bc6d70 100644
--- a/lua/custom/autocmds.lua
+++ b/lua/custom/autocmds.lua
@@ -79,3 +79,17 @@ vim.api.nvim_create_autocmd('ColorScheme', {
     vim.cmd [[highlight Comment gui=NONE]] -- no italics for comments
   end,
 })
+
+-- pin main.typ for typst projects
+vim.api.nvim_create_autocmd('FileType', {
+  group = augroup,
+  pattern = {
+    'typst',
+  },
+  callback = function()
+    -- pin the main file
+    vim.lsp.buf.execute_command { command = 'tinymist.pinMain', arguments = { vim.api.nvim_buf_get_name(0) } }
+    -- -- unpin the main file
+    -- vim.lsp.buf.execute_command { command = 'tinymist.pinMain', arguments = { nil } }
+  end,
+})