diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8404b841d0d59c3d5a5accee0d6db61186a0953d..97c4fb343dd4456afd138eca1598e0a6bbf1fce4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -127,9 +127,10 @@ sync_repo_on_HPC:
 update_acls:
   stage: deploy
   matrix:
-    - SYSTEM: juwels
-    - SYSTEM: jureca
-    - SYSTEM: jusuf
+    - SYSTEM:
+      - juwels
+      - jureca
+      - jusuf
   tags:
     - jacamar
     - ${SYSTEM}