diff --git a/.gitlab-ci/commit-rules.yml b/.gitlab-ci/commit-rules.yml
index 4c0f93d50..3f9bee467 100644
--- a/.gitlab-ci/commit-rules.yml
+++ b/.gitlab-ci/commit-rules.yml
@@ -12,5 +12,5 @@ patterns:
     - regex: '([^.]\.|[:,;])\s*$'
       message: Commit message subject should not end with punctuation
       where: subject
-    - regex: '^Closes:?\s*#[0-9]+'
+    - regex: '^[Cc]lose[sd]?:?\s*#[0-9]+'
       message: Closes instructions must be a full link