diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e2d9228b5ef4cb809aebb6da2d9be9b56c756820..ae6bf739410bcfa739f3723e2d965a4f9275930e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -49,7 +49,7 @@ terraform_apply:
   extends: .tf_admin
   stage: apply
   script:
-    - gitlab-terraform apply -parallelism=2
+    - gitlab-terraform apply -parallelism=1
   when: manual
   only:
     - master