diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7e755d81df35e49fa3a8998f6eb294e1fbfacf63..f5a4fe0fc0fbe573e73c4a295017b705c1a705d9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -32,6 +32,10 @@ centos8:
   image: gitlab-registry.cern.ch/linuxsupport/c8-base
   <<: *build-template_definition
 
+centos-stream9:
+  image: gitlab-registry.cern.ch/linuxsupport/cs9-base
+  <<: *build-template_definition
+
 fedora-34:
   image: fedora:34
   <<: *build-template_definition