diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6fbb3ef..e6942b6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -72,3 +72,4 @@ build standalone amd64:
     - docker build --pull --cache-from $CI_REGISTRY_IMAGE:standalone --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-standalone . -f maubot/standalone/Dockerfile
     - if [ "$CI_COMMIT_BRANCH" = "master" ]; then docker tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-standalone $CI_REGISTRY_IMAGE:standalone && docker push $CI_REGISTRY_IMAGE:standalone; fi
     - if [ "$CI_COMMIT_BRANCH" != "master" ]; then docker tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-standalone $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME-standalone && docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME-standalone; fi
+    - docker rmi $CI_REGISTRY_IMAGE:standalone $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME-standalone $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-standalone