diff --git a/docs/tutorial/installation/cos-lite-canonical-k8s-sandbox.conf b/docs/tutorial/installation/cos-lite-canonical-k8s-sandbox.conf
index 03246a69..aede4e42 100644
--- a/docs/tutorial/installation/cos-lite-canonical-k8s-sandbox.conf
+++ b/docs/tutorial/installation/cos-lite-canonical-k8s-sandbox.conf
@@ -16,7 +16,7 @@ runcmd:
     k8s status --wait-ready
     k8s enable local-storage
     k8s enable load-balancer
-    k8s set load-balancer.l2-mode=true load-balancer.cidrs="$(ip -4 -j route get 2.2.2.2 | jq -r '.[] | .prefsrc')/32"
+    k8s set load-balancer.l2-mode=true load-balancer.cidrs="$(ip -4 -j route get 2.2.2.2 | jq -r '.[] | .prefsrc')/24"
     k8s status --wait-ready
 
     echo "Adding K8s cloud to Juju..."