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 9f580af436d..c11bf0cf6dc 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
@@ -20,6 +20,8 @@ echo "export LC_ALL=en_US.UTF-8" >> ~/.bashrc
 locale-gen
 source ~/.bashrc
 
+# upgrade firmware-brcm80211 broke access point on rpi4
+apt-mark hold firmware-brcm80211
 apt-get update && apt-get -y upgrade
 # Do not be too fast to upgrade to more recent firmware and kernel than 4.38
 # Firmware 4.44 seems to prevent the LED mechanism from working
diff --git a/addons/point_of_sale/tools/posbox/posbox_create_image.sh b/addons/point_of_sale/tools/posbox/posbox_create_image.sh
index e46d0027779..6187252cec7 100755
--- a/addons/point_of_sale/tools/posbox/posbox_create_image.sh
+++ b/addons/point_of_sale/tools/posbox/posbox_create_image.sh
@@ -33,11 +33,11 @@ VERSION_IOTBOX=21.03
 REPO=https://github.com/odoo/odoo.git
 
 if ! file_exists *raspios*.img ; then
-    wget 'http://downloads.raspberrypi.org/raspios_lite_armhf/images/raspios_lite_armhf-2021-01-12/2021-01-11-raspios-buster-armhf-lite.zip' -O raspios.img.zip
+    wget 'http://downloads.raspberrypi.org/raspbian_lite/images/raspbian_lite-2020-02-07/2020-02-05-raspbian-buster-lite.zip' -O raspios.img.zip
     unzip raspios.img.zip
 fi
 
-RASPIOS=$(echo *raspios*.img)
+RASPIOS=$(echo *raspbian*.img)
 rsync -avh --progress "${RASPIOS}" iotbox.img
 
 CLONE_DIR="${OVERWRITE_FILES_BEFORE_INIT_DIR}/home/pi/odoo"