diff --git a/ansible/group_vars/alpha-khronos.yml b/ansible/group_vars/alpha-khronos.yml
index 00c02243..313cfe2b 100644
--- a/ansible/group_vars/alpha-khronos.yml
+++ b/ansible/group_vars/alpha-khronos.yml
@@ -9,10 +9,11 @@ npm_version: 2
 # for cron job
 # this is the list of queues we want to enqueue a job into
 main_cron_queues: "\
+  khronos:containers:image-builder:prune \
   khronos:containers:orphan:prune \
   khronos:context-versions:prune-expired \
   khronos:images:prune \
-  khronos:containers:image-builder:prune \
+  khronos:instances:cleanup \
   khronos:weave:prune"
 
 canary_cron_queues: "\