diff --git a/de/heat-templates/env/mstr1-wrkr3-cmp3-gtw0.yaml b/de/heat-templates/env/mstr1-wrkr3-cmp3-gtw0.yaml
index 9be9975..ffb67ac 100644
--- a/de/heat-templates/env/mstr1-wrkr3-cmp3-gtw0.yaml
+++ b/de/heat-templates/env/mstr1-wrkr3-cmp3-gtw0.yaml
@@ -31,6 +31,8 @@
   cmps_flavor: 'mosk.s.compute.ephemeral'
   storage_frontend_network_cidr: '10.12.1.0/24'
   storage_backend_network_cidr: '10.12.0.0/24'
+  cmp_lvm_loop_device_size: 50
+  cmp_cinder_lvm_loop_device_size: 50
   hardware_metadata: |
     '00:00:00:00:00:00':
       write_files: