diff --git a/module2/ressources/rr_org/init.el b/module2/ressources/rr_org/init.el
index b31ada9d601bf413573a7ba5ba67c91d845a7c82..3a7940adb36ea47b307c59632371d89016c18995 100644
--- a/module2/ressources/rr_org/init.el
+++ b/module2/ressources/rr_org/init.el
@@ -50,6 +50,9 @@
 ;;   (setenv "JVM_OPTS" (concat "-Dhttp.proxyHost=" proxy-name
 ;;                              " -Dhttp.proxyPort=" proxy-port)))
 
+(add-to-list 'package-archives
+		 '("melpa-stable" . "http://stable.melpa.org/packages/"))
+
 (require 'org)
 
 (require 'ess-site)
diff --git a/module2/ressources/rr_org/init.org b/module2/ressources/rr_org/init.org
index cf259c1b136e551827db2cb4f11e9166c27d1fd7..6cf48f11c870f2f3c7637e09b4273fa2c9649710 100644
--- a/module2/ressources/rr_org/init.org
+++ b/module2/ressources/rr_org/init.org
@@ -74,6 +74,12 @@ document, simply =M-x org-babel-tangle=.
 ;;                              " -Dhttp.proxyPort=" proxy-port)))
 #+end_src
 
+* Package sources
+** Use melpa-stable
+#+BEGIN_SRC emacs-lisp :tangle init.el
+(add-to-list 'package-archives
+		 '("melpa-stable" . "http://stable.melpa.org/packages/"))
+#+END_SRC
 * Loading files:  
 ** Loading babel: 						     :ARNAUD:
 #+begin_src emacs-lisp :tangle init.el