diff --git a/zuul.d/docker-images/base.yaml b/zuul.d/docker-images/base.yaml
index 79648fb527..f3d962bfc7 100644
--- a/zuul.d/docker-images/base.yaml
+++ b/zuul.d/docker-images/base.yaml
@@ -21,7 +21,7 @@
     dependencies: opendev-buildset-registry
     abstract: true
     vars:
-      docker_mirror_base_url: "http://{{ zuul_site_mirror_fqdn }}/deb-docker/{{ ansible_distribution_release }}"
+      docker_mirror_base_url: "https://{{ zuul_site_mirror_fqdn }}/deb-docker/{{ ansible_distribution_release }}"
       zuul_work_dir: "{{ zuul.projects['opendev.org/opendev/system-config'].src_dir }}"
 
 - job:
@@ -30,6 +30,7 @@
     dependencies: opendev-buildset-registry
     abstract: true
     vars:
+      docker_mirror_base_url: "https://{{ zuul_site_mirror_fqdn }}/deb-docker/{{ ansible_distribution_release }}"
       zuul_work_dir: "{{ zuul.projects['opendev.org/opendev/system-config'].src_dir }}"
     secrets:
       name: docker_credentials