diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6ba909603e3982e9d47c0e070dc801256c64175e..8d17a421f0a0812fb68ae874b965afcb7f8d68e7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -42,8 +42,8 @@ docker_publish_alpha:
     test "${DOCKER_ALPHA_AUTH_CONFIG}" == "" && echo "docker-config does not exists, aborting!" && false
     mkdir -p ~/.docker && echo "$DOCKER_ALPHA_AUTH_CONFIG" >~/.docker/config.json
     docker load --input=image.tar.gz
-    docker tag image ${alpha_repo}:alpha-${CI_COMMIT_REF_NAME}
-    docker push ${alpha_repo}:alpha-${CI_COMMIT_REF_NAME}
+    docker tag image ${alpha_repo}:alpha-${CI_COMMIT_REF_SLUG}
+    docker push ${alpha_repo}:alpha-${CI_COMMIT_REF_SLUG}
   dependencies:
   - docker_build
   tags: