diff --git a/scripts/upgrade b/scripts/upgrade
index e1acc42..c091fa3 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -7,6 +7,7 @@
 #=================================================
 
 source _common.sh
+source ynh_install_ruby__2
 source /usr/share/yunohost/helpers
 
 #=================================================