diff --git a/README.md b/README.md
index 7077030..2c87275 100644
--- a/README.md
+++ b/README.md
@@ -332,6 +332,8 @@ nmap s <Plug>(easymotion-s)
 omap t <Plug>(easymotion-bd-tl)
 " Use uppercase target labels and type as a lower case
 let g:EasyMotion_use_upper = 1
+" Ensure keys do not contain lower case ones
+let g:EasyMotion_keys = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ;'
  " type `l` and match `l`&`L`
 let g:EasyMotion_smartcase = 1
 " Smartsign (type `3` and match `3`&`#`)