diff --git a/automation/scripts/qubes-x86-64.sh b/automation/scripts/qubes-x86-64.sh
index 2d4cf2e226..916dbaae59 100755
--- a/automation/scripts/qubes-x86-64.sh
+++ b/automation/scripts/qubes-x86-64.sh
@@ -123,7 +123,7 @@ TFTP=/scratch/gitlab-runner/tftp
 CONTROLLER=control@thor.testnet
 
 echo '
-multiboot2 (http)/gitlab-ci/xen console=com1 com1=115200,8n1 loglvl=all guest_loglvl=all
+multiboot2 (http)/gitlab-ci/xen console=com1 com1=115200,8n1 loglvl=all guest_loglvl=all dom0_mem=4G
 module2 (http)/gitlab-ci/vmlinuz console=hvc0 root=/dev/ram0
 module2 (http)/gitlab-ci/initrd-dom0
 ' > $TFTP/grub.cfg