diff --git a/CICD/infra/os_create.yml b/CICD/infra/os_create.yml
index faf9441cbd8b94217c39389405b5286453323f9a..d75265aec59797309e84b0c7f4747bae15e36b02 100644
--- a/CICD/infra/os_create.yml
+++ b/CICD/infra/os_create.yml
@@ -104,8 +104,8 @@
       userdata: "{{ os_userdata }}"
       name: "{{ item.vmname }}"
     loop:
-      - { vmname: "{{ project_name }}-login0", flavor: t3.medium }
-      - { vmname: "{{ project_name }}-login1", flavor: t3.medium }
+      - { vmname: "{{ project_name }}-login0", flavor: m3.small }
+      - { vmname: "{{ project_name }}-login1", flavor: m3.small }
 
 - name: create volumes for slurmstate and homedir
   hosts: localhost
@@ -153,7 +153,7 @@
       name: "{{ item.vmname }}"
       volumes: [ "{{ slurm_state_volume.volume.id }}", "{{ user_volume.volume.id }}"]
     loop:
-      - { vmname: "{{ project_name }}-sql0", flavor: t3.medium }
+      - { vmname: "{{ project_name }}-sql0", flavor: m3.small }
 
 
   - name: create compute nodes 
@@ -177,8 +177,8 @@
       userdata: "{{ os_userdata }}"
       name: "{{ item.vmname }}"
     loop:
-      - { vmname: "{{ project_name }}-node00", flavor: t3.medium }
-      - { vmname: "{{ project_name }}-node01", flavor: t3.medium }
+      - { vmname: "{{ project_name }}-node00", flavor: m3.small }
+      - { vmname: "{{ project_name }}-node01", flavor: m3.small }
 
   - name: attach floating ip
     openstack.cloud.floating_ip: