diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 95a00d67c48077f9e330088d7bf3a1eb25399ce9..fa58a4dd319468269130b5199cedc9e744227542 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -14,7 +14,7 @@ variables:
   OS_IDENTITY_API_VERSION: "3"
   OS_INTERFACE: "public"
   OS_REGION_NAME: "bhm1"
-  PKR_VAR_flavor: "m1.small"
+  PKR_VAR_flavor: "m1.medium-ruffner"
   PKR_VAR_source_image: "CentOS-7-x86_64-GenericCloud-2009"
   PKR_VAR_floating_ip_network: "uab-campus"
   PKR_VAR_security_groups: '["allow-ssh"]'
@@ -112,7 +112,7 @@ build_base_image:
     - *update_ansible_repo
     - *get_ansible_files
     - export REPO_HEAD=$(git rev-parse --short HEAD)
-    - export PKR_VAR_flavor="m1.medium"
+    - export PKR_VAR_flavor="m1.medium-ruffner"
     - export PKR_VAR_build_instance_name="base-${REPO_HEAD}"
     - export PKR_VAR_image_date_suffix=false
     - |
@@ -142,7 +142,7 @@ build_compute_image:
     - *get_ansible_files
     - export PKR_VAR_source_image=${BUILT_BASE_IMAGE_ID}
     - export REPO_HEAD=$(git rev-parse --short HEAD)
-    - export PKR_VAR_flavor="m1.medium"
+    - export PKR_VAR_flavor="m1.medium-ruffner"
     - export PKR_VAR_build_instance_name="compute-${REPO_HEAD}"
     - export PKR_VAR_image_date_suffix=false
     - |
@@ -215,7 +215,7 @@ build_ood_image:
     - |
       if [ $CI_PIPELINE_SOURCE == 'merge_request_event' ]; then
         export PKR_VAR_image_name="ood-PR-${CI_MERGE_REQUEST_IID}"
-        echo INSTANCE_FLAVOR="m1.small" | tee -a $CI_PROJECT_DIR/image.env
+        echo INSTANCE_FLAVOR="m1.medium-ruffner" | tee -a $CI_PROJECT_DIR/image.env
         echo OOD_INSTANCE_NAME="ood-PR-${CI_MERGE_REQUEST_IID}" | tee -a $CI_PROJECT_DIR/image.env
         export FLOATING_IP=$(openstack floating ip create uab-campus -f value -c floating_ip_address)
         echo FLOATING_IP=$FLOATING_IP | tee -a $CI_PROJECT_DIR/image.env