diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index fc6a65219b4ae8d08d644207c7606a9319b58dbf..6f7a71cb3c2ac8a44c06d1c72115e2292c3f0be1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -115,7 +115,7 @@ ansible_create_cluster_stage:
     - pwd
     - python3 ./make_files.py ./inventory.yml ./infra/os_vars.yml ./vars/versions.yml
     - ssh-keygen -R `cat ssh.cfg  | grep Proxy | cut -f 2 -d "@"`
-    - ssh `cat ssh.cfg  | grep Proxy | cut -f 2 -d "="` -o StrictHostKeyChecking=no exit 0
+    - ssh `cat ssh.cfg  | grep Proxy | cut -f 2 -d "="` -l ubuntu -o StrictHostKeyChecking=no exit 0
     - ansible-playbook -i inventory.yml --key-file ../tmp_key  upgrade_and_reboot.yml
     - ansible-playbook -i inventory.yml --key-file ../tmp_key  master_playbook.yml
     - sleep 15