diff --git a/.config/nvim/ftplugin/elna.lua b/.config/nvim/ftplugin/elna.lua
new file mode 100644
index 0000000..3b57b0b
--- /dev/null
+++ b/.config/nvim/ftplugin/elna.lua
@@ -0,0 +1,3 @@
+vim.bo.expandtab = true
+vim.bo.tabstop = 2
+vim.bo.shiftwidth = 2
diff --git a/.config/nvim/init.lua b/.config/nvim/init.lua
index 88ed645..a6bb431 100644
--- a/.config/nvim/init.lua
+++ b/.config/nvim/init.lua
@@ -110,3 +110,10 @@ vim.keymap.set('n', '<space>e', vim.diagnostic.open_float, opts)
 vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
 vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)
 vim.keymap.set('n', '<space>q', vim.diagnostic.setloclist, opts)
+
+-- Custom file types.
+vim.filetype.add({
+	extension = {
+		elna = 'elna'
+	}
+})