diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index aa61ad3..053e87e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -15,6 +15,7 @@ before_script:
     libxslt libxslt-dev zlib-dev zlib
     ruby ruby-dev yaml yaml-dev
     libffi-dev build-base git nodejs
+  - gem install etc --no-document
   - gem install bundler -v 2.3.26
   - pwd
   - ls -l