diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f259dab..dffa27a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -108,7 +108,7 @@ gitea-arm64-trigger:
       -v $CI_PROJECT_DIR:/src
       -e CI_PROJECT_DIR=/src
       -e CI_COMMIT_TAG=$CI_COMMIT_TAG
-      jrei/systemd-ubuntu:20.04
+      jrei/systemd-ubuntu:$UBUNTU_VERSION
     - docker exec -t systemd-ubuntu /bin/bash /src/.gitlab-ci/test-install.sh
 
 .test-update: &test-update
@@ -129,7 +129,7 @@ gitea-arm64-trigger:
       -v $CI_PROJECT_DIR:/src
       -e CI_PROJECT_DIR=/src
       -e CI_COMMIT_TAG=$CI_COMMIT_TAG
-      jrei/systemd-ubuntu:20.04
+      jrei/systemd-ubuntu:$UBUNTU_VERSION
     - docker exec -t systemd-ubuntu /bin/bash /src/.gitlab-ci/test-update.sh
 
 test-install-trigger: