diff --git a/.github/scripts/Linux/arm/bootstrap.sh b/.github/scripts/Linux/arm/bootstrap.sh
index 58d4794aa..daec755e1 100755
--- a/.github/scripts/Linux/arm/bootstrap.sh
+++ b/.github/scripts/Linux/arm/bootstrap.sh
@@ -7,6 +7,9 @@ OLDPWD=$(pwd)
 
 if grep -q Raspbian /etc/os-release; then # https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1670905 workaround
         sed -i s-http://deb.debian.org/debian-http://mirrordirector.raspbian.org/raspbian/- /etc/apt/sources.list
+        apt -y install curl
+        curl http://archive.raspberrypi.org/debian/raspberrypi.gpg.key | apt-key add -
+        echo 'deb http://archive.raspberrypi.org/debian buster main' >> /etc/apt/sources.list
         apt -y update
 fi