diff --git a/rails/gitlab-ci.yml b/rails/gitlab-ci.yml
index d8aeea2fbdd60594056074dd524dfb5388b1e9ac..e6aec640d92ebaba6c8249e02371a75bac797020 100644
--- a/rails/gitlab-ci.yml
+++ b/rails/gitlab-ci.yml
@@ -109,6 +109,6 @@ rails_test_all:
       - log/test.log
     expire_in: 1 week
   before_script:
-    - gem install bundler --silent && bundle install --jobs $(nproc) --quiet
+    - gem install --conservative bundler --silent && bundle install --jobs $(nproc) --quiet
   script:
     - bin/rails db:prepare test:all