diff --git a/README.md b/README.md
index d123ec03..b2a74694 100644
--- a/README.md
+++ b/README.md
@@ -90,8 +90,8 @@ Optionally customise your mappings, see [:help nvim-tree-mappings](doc/nvim-tree
     api.config.mappings.default_on_attach(bufnr)
 
     -- custom mappings
-    vim.keymap.set("n", "<C-t>", api.tree.change_root_to_parent, opts "Up")
-    vim.keymap.set("n", "?", api.tree.toggle_help, opts "Help")
+    vim.keymap.set('n', '<C-t>', api.tree.change_root_to_parent,        opts('Up'))
+    vim.keymap.set('n', '?',     api.tree.toggle_help,                  opts('Help'))
   end
 
   -- pass to setup along with your other options
diff --git a/doc/nvim-tree-lua.txt b/doc/nvim-tree-lua.txt
index 9b16d3af..6474f911 100644
--- a/doc/nvim-tree-lua.txt
+++ b/doc/nvim-tree-lua.txt
@@ -120,8 +120,8 @@ Optionally customise your |nvim-tree-mappings| via |nvim-tree.on_attach| >
     api.config.mappings.default_on_attach(bufnr)
 
     -- custom mappings
-    vim.keymap.set("n", "<C-t>", api.tree.change_root_to_parent, opts "Up")
-    vim.keymap.set("n", "?", api.tree.toggle_help, opts "Help")
+    vim.keymap.set('n', '<C-t>', api.tree.change_root_to_parent,        opts('Up'))
+    vim.keymap.set('n', '?',     api.tree.toggle_help,                  opts('Help'))
   end
 
   -- pass to setup along with your other options