diff --git a/README.md b/README.md
index 2ba976b3608..cb410e83964 100644
--- a/README.md
+++ b/README.md
@@ -248,7 +248,7 @@ nmap <silent> <C-s> <Plug>(coc-range-select)
 xmap <silent> <C-s> <Plug>(coc-range-select)
 
 " Add `:Format` command to format current buffer.
-command! -nargs=0 Format :call CocAction('format')
+command! -nargs=0 Format :call CocActionAsync('format')
 
 " Add `:Fold` command to fold current buffer.
 command! -nargs=? Fold :call     CocAction('fold', <f-args>)