diff --git a/init.el b/init.el
index 9cf15ac..c8155d3 100644
--- a/init.el
+++ b/init.el
@@ -89,7 +89,10 @@
 (use-package lisp-mode
   :config
   (add-hook 'emacs-lisp-mode-hook 'outline-minor-mode)
-  (add-hook 'emacs-lisp-mode-hook 'reveal-mode))
+  (add-hook 'emacs-lisp-mode-hook 'reveal-mode)
+  (defun indent-spaces-mode ()
+    (setq indent-tabs-mode nil))
+  (add-hook 'lisp-interaction-mode-hook #'indent-spaces-mode))
 
 (use-package magit
   :defer t