diff --git a/prepare-vms/settings/jerome.yaml b/prepare-vms/settings/jerome.yaml
index 4f68a3e4..492c95fd 100644
--- a/prepare-vms/settings/jerome.yaml
+++ b/prepare-vms/settings/jerome.yaml
@@ -1,5 +1,5 @@
 # Number of VMs per cluster
-clustersize: 4
+clustersize: 3
 
 # The hostname of each node will be clusterprefix + a number
 clusterprefix: node