diff --git a/group_vars/ocinode.yml b/group_vars/ocinode.yml
index 7e132c3..7f06eb1 100644
--- a/group_vars/ocinode.yml
+++ b/group_vars/ocinode.yml
@@ -1,6 +1,8 @@
 ---
 # increase memory size
 mem_size: 4096
+# increase disk size to store docker images
+dsk_size: 50
 
 firewall_in:
   - {proto: tcp, port: 22, from: [172.20.20.0/22]}