diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7666e87..8b43cb6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,6 +8,7 @@ before_script:
   - pip install mkdocs
   - pip install mkdocs-material
 
+  - sudo apt get install docker
   - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
 
 pages: