diff --git a/ansible/roles/borg/backup.yml.j2 b/ansible/roles/borg/backup.yml.j2
index 31894ab..882ea49 100644
--- a/ansible/roles/borg/backup.yml.j2
+++ b/ansible/roles/borg/backup.yml.j2
@@ -3,6 +3,8 @@ location:
     - /mnt/thecloud
   repositories:
     - /mnt/backups/share
+  exclude_patterns:
+    - /mnt/thecloud/mastodon/system/cache
 retention:
   keep_daily: 7
   keep_weekly: 4