-ENV EFI_JAMMY_AMD64 http://archive.ubuntu.com/ubuntu/dists/focal/main/uefi/grub2-amd64/current/grubnetx64.efi.signed
-ENV EFI_JAMMY_ARM64 http://ports.ubuntu.com/ubuntu-ports/dists/focal/main/uefi/grub2-arm64/current/grubnetaa64.efi.signed
+ENV EFI_JAMMY_AMD64 http://archive.ubuntu.com/ubuntu/dists/jammy/main/uefi/grub2-amd64/current/grubnetx64.efi.signed
+ENV EFI_JAMMY_ARM64 http://ports.ubuntu.com/ubuntu-ports/dists/jammy/main/uefi/grub2-arm64/current/grubnetaa64.efi.signed