diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3ca713f..75cebf0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -37,7 +37,7 @@ pages:
 gitlab-ci-pre-commit:
   stage: build
   before_script:
-    - apk add --no-cache python3 python3-dev py3-pip py3-wheel git gcc musl-dev bash nodejs-current npm
+    - apk add --no-cache python3 python3-dev py3-pip py3-wheel git gcc musl-dev bash nodejs-current npm ruby ruby-bundler
     - pip install pre-commit
   script:
     - pre-commit run --all-files --show-diff-on-failure