diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index fde220020..094e45cf5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -85,7 +85,7 @@ build-1.15.7-otp-25:
   - .build_changes_policy
   - .using-ci-base
   stage: build
-  image: elixir:1.15.7-otp-25
+  image: git.pleroma.social:5050/pleroma/pleroma/ci-base-1.15
   allow_failure: true
   script:
   - mix compile --force
@@ -147,7 +147,7 @@ unit-testing-1.15.7-otp-25:
   - .build_changes_policy
   - .using-ci-base
   stage: test
-  image: elixir:1.15.7-otp-25
+  image: git.pleroma.social:5050/pleroma/pleroma/ci-base-1.15
   allow_failure: true
   cache: *testing_cache_policy
   services: *testing_services