diff --git a/docker/prod-values.yml b/docker/prod-values.yml
index 7f9caf9..5338e76 100644
--- a/docker/prod-values.yml
+++ b/docker/prod-values.yml
@@ -455,6 +455,12 @@ configmaps:
       path: /dev/stdout
       [logging.vette]
       path: /dev/stdout
+      # Plugin configuration.
+      [plugin.uw_mailman3_plugin]
+      class: uw_mailman3_plugin.UWPlugin
+      enabled: yes
+      [styles]
+      default: UW-March-2024-NoArch
   mailman-hyperkitty-tpl:
     mailman-hyperkitty.tpl: |
       [general]