diff --git a/inventory/group_vars/copr_aws b/inventory/group_vars/copr_aws
index 7660552aa6..810982382a 100644
--- a/inventory/group_vars/copr_aws
+++ b/inventory/group_vars/copr_aws
@@ -41,7 +41,7 @@ builders:
     x86_64: [20, 4, 20]
   ibm_cloud_us_east:
     # s390x is on-demand
-    s390x: [18, 6, 6]
+    s390x: [12, 6, 6]
   ibm_cloud_tokyo:
     # tokyo is evacuated
     s390x: [0, 6, 6]
diff --git a/roles/copr/backend/templates/resalloc/ibm-cloud-vm.j2 b/roles/copr/backend/templates/resalloc/ibm-cloud-vm.j2
index 86e104eb20..60d278ab37 100644
--- a/roles/copr/backend/templates/resalloc/ibm-cloud-vm.j2
+++ b/roles/copr/backend/templates/resalloc/ibm-cloud-vm.j2
@@ -14,7 +14,7 @@ case $RESALLOC_NAME in
         vpc_id=r014-e90f14b0-a9c0-4c0b-bc81-207904b2d19e
         security_group_id=r014-941706bd-062c-4d4c-9512-9a31b8f257d7
         ssh_key_id=r014-fc1c1b90-5a7f-4cc6-a6d4-b273bd19be99
-        instance_type=cz2-2x4
+        instance_type=mz2-2x16
         image_uuid="{{ copr_builder_images.ibm_cloud.s390x.us_east }}"
         subnets_ids="us-east-1:0757-df8209fd-e4e4-4659-bcca-b60c9eddfb35 us-east-2:0767-4cb7e11d-14db-48a8-9d1d-c59679112cd5 us-east-3:0777-bc697f15-4f13-4843-b338-d8950e3d23c0"
         zone=us-east