diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7ce04fc1c8184279a7f86ba5242679a7ce6c4924..75edd9a0b37cfd3e2c90b8d86317505f9530c5af 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -37,13 +37,14 @@ ubuntu20.4-doc:docker-build:
 # --- Build doc/web site and publish it ---
 doc:build:
   stage: doc-build
-  variables:
-    IMAGE_NAME: $CI_REGISTRY_IMAGE/ubuntu20.04-doc
+  image: $CI_REGISTRY_IMAGE/ubuntu20.04-doc
   script:
     - sphinx-build -b html -d build/doctrees docs/ build
   artifacts:
     paths:
       - build/
+    expire_in: 2 days
+  
 pages:
 
   image: python:alpine