diff --git a/README.org b/README.org
index 74650af..199a9e1 100644
--- a/README.org
+++ b/README.org
@@ -1056,7 +1056,11 @@ Set fill column to 88 and enable display in python buffers
     (set-fill-column col)
     (display-fill-column-indicator-mode +1))
 
-  (add-hook 'python-base-mode-hook (lambda () (my/enable-fill-column 88)))
+  (use-package python
+    :custom
+    (python-check-command "mypy")
+    :config
+    (add-hook 'python-base-mode-hook (lambda () (my/enable-fill-column 88))))
 #+end_src
 *** Rust
 #+begin_src emacs-lisp