diff --git a/addons/point_of_sale/tools/posbox/overwrite_before_init/etc/init_posbox_image.sh b/addons/point_of_sale/tools/posbox/overwrite_before_init/etc/init_posbox_image.sh
index 1a07dc6158f..057b7a4e926 100755
--- a/addons/point_of_sale/tools/posbox/overwrite_before_init/etc/init_posbox_image.sh
+++ b/addons/point_of_sale/tools/posbox/overwrite_before_init/etc/init_posbox_image.sh
@@ -19,7 +19,7 @@ echo "export LC_ALL=en_US.UTF-8" >> ~/.bashrc
 locale-gen
 source ~/.bashrc
 
-apt-get update && apt-get -y upgrade
+apt-get update
 
 # At the first start it is necessary to configure a password
 # This will be modified by a unique password on the first start of Odoo