diff --git a/docker/base/sources.list.ubuntu b/docker/base/sources.list.ubuntu
index cac2299544..5bfc3a10e1 100644
--- a/docker/base/sources.list.ubuntu
+++ b/docker/base/sources.list.ubuntu
@@ -1,9 +1,9 @@
 # For non-x86 architectures we use sources.list.ubuntu.<arch>
 
 # Default repos
-deb http://archive.ubuntu.com/ubuntu/ bionic main universe
-deb http://archive.ubuntu.com/ubuntu/ bionic-updates main universe
-deb http://archive.ubuntu.com/ubuntu/ bionic-security main universe
+deb mirror://mirrors.ubuntu.com/mirrors.txt bionic main universe
+deb mirror://mirrors.ubuntu.com/mirrors.txt bionic-updates main universe
+deb mirror://mirrors.ubuntu.com/mirrors.txt bionic-security main universe
 
 # Backports have a lower priority and must be explicitly installed to be used
 deb http://archive.ubuntu.com/ubuntu/ bionic-backports main universe
diff --git a/releasenotes/notes/ubuntu-uses-mirrors-now-0858d579944eea48.yaml b/releasenotes/notes/ubuntu-uses-mirrors-now-0858d579944eea48.yaml
new file mode 100644
index 0000000000..aa5d418ea6
--- /dev/null
+++ b/releasenotes/notes/ubuntu-uses-mirrors-now-0858d579944eea48.yaml
@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    Ubuntu based images use APT mirrors now. May affect builds done behind http
+    proxies.
diff --git a/tests/templates/template_overrides.j2 b/tests/templates/template_overrides.j2
index 515ae63ce0..c25ddb9286 100644
--- a/tests/templates/template_overrides.j2
+++ b/tests/templates/template_overrides.j2
@@ -75,7 +75,7 @@ RUN sed -i -e "s|http://deb.debian.org|http://{{ nodepool_mirror_host }}|" \
 {% elif base_distro == "ubuntu" %}
 {% endraw %}
 
-RUN sed -i -e "s|http://archive.ubuntu.com|http://{{ nodepool_mirror_host }}|" \
+RUN sed -i -e "s|mirror://mirrors.ubuntu.com/mirrors.txt|http://{{ nodepool_mirror_host }}/ubuntu/|" \
         -e "s|http://ubuntu-cloud.archive.canonical.com/ubuntu|http://{{ nodepool_mirror_host }}/ubuntu-cloud-archive|" \
         /etc/apt/sources.list