diff --git a/TLLA/gitlab-ci-2021.yml b/TLLA/gitlab-ci-2021.yml
index a09ad1fb89319013fb96d6863d9eb8e72440d4bf..2127b71017864bbd90770703cf9d38f768334cd1 100644
--- a/TLLA/gitlab-ci-2021.yml
+++ b/TLLA/gitlab-ci-2021.yml
@@ -1,5 +1,3 @@
-image: ruby:3.1
-
 stages:
   - build
   - deploy
@@ -10,6 +8,7 @@ variables:
   CACHE_DIR: vendor/bundle/
 
 .build:
+  image: ruby:3.1
   stage: build
   before_script:
     - apt-get update -qy
@@ -27,6 +26,7 @@ variables:
       - web/$CACHE_DIR
 
 .deploy:
+  image: debian:bullseye
   stage: deploy
   variables:
   before_script: