diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7ef6f3001..fc4c6aa37 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -208,7 +208,7 @@ build_backend:
   before_script:
     - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
   script:
-    - docker system prune -f
+    - docker system prune -af
     - cd api
     - docker build -t $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME .
     - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME