diff --git a/lua/junikim/options.lua b/lua/junikim/options.lua
index 8d27c01..7405529 100644
--- a/lua/junikim/options.lua
+++ b/lua/junikim/options.lua
@@ -55,6 +55,16 @@ vim.api.nvim_create_autocmd(
   }
 )
 
+vim.api.nvim_create_autocmd(
+  { "BufRead", "BufNewFile" },
+  {
+    pattern = { "*.mdx", "*.md" },
+    callback = function(args)
+      vim.bo.filetype = "markdown"
+    end
+  }
+)
+
 vim.api.nvim_create_autocmd("FileType", {
   pattern = { "tex", "text" },
   callback = function(args)