diff --git a/lisp/ein-cell-edit.el b/lisp/ein-cell-edit.el
index 119eae4..eb8d199 100644
--- a/lisp/ein-cell-edit.el
+++ b/lisp/ein-cell-edit.el
@@ -26,8 +26,8 @@
 ;;; Code:
 (require 'ein-cell)
 (require 'org-src)
-(require 'ess-r-mode)
-(require 'markdown-mode)
+(require 'ess-r-mode nil t)
+(require 'markdown-mode nil t)
 
 (defvar ein:src--cell nil)
 (defvar ein:src--ws nil)