diff --git a/ubuntu2004.pkrvars.hcl b/ubuntu2004.pkrvars.hcl
index c839dc8..ce9ca2a 100644
--- a/ubuntu2004.pkrvars.hcl
+++ b/ubuntu2004.pkrvars.hcl
@@ -4,7 +4,7 @@ vsphere_guest_os_type = "ubuntu64Guest"
 vsphere_name = "ccdc-basebox-ubuntu-20.04"
 
 output_directory = "output/ubuntu-20.04/"
-iso_url = "http://releases.ubuntu.com/20.04/ubuntu-20.04.6-live-server-amd64.iso"
+iso_url = "https://releases.ubuntu.com/focal/ubuntu-20.04.6-live-server-amd64.iso"
 iso_checksum = "sha256:b8f31413336b9393ad5d8ef0282717b2ab19f007df2e9ed5196c13d8f9153c8b"
 box_basename = "ubuntu-20.04"
 vagrant_box = "ccdc-basebox/ubuntu-20.04"
diff --git a/ubuntu2204.pkrvars.hcl b/ubuntu2204.pkrvars.hcl
index a36f5f0..a4a7e59 100644
--- a/ubuntu2204.pkrvars.hcl
+++ b/ubuntu2204.pkrvars.hcl
@@ -4,7 +4,7 @@ vsphere_guest_os_type = "ubuntu64Guest"
 vsphere_name = "ccdc-basebox-ubuntu-22.04"
 
 output_directory = "output/ubuntu-22.04/"
-iso_url = "http://releases.ubuntu.com/22.04/ubuntu-22.04.3-live-server-amd64.iso"
+iso_url = "https://releases.ubuntu.com/jammy/ubuntu-22.04.5-live-server-amd64.iso"
 iso_checksum = "sha256:a4acfda10b18da50e2ec50ccaf860d7f20b389df8765611142305c0e911d16fd"
 box_basename = "ubuntu-22.04"
 vagrant_box = "ccdc-basebox/ubuntu-22.04"