diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index fb7e2eeb..d9125e9c 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -173,9 +173,10 @@ Publish a new release
 
 1. Check that dependencies are up to date with ``poetry show --outdated --with dev,doc,demo`` and update dependencies accordingly in separated commits.
 2. Check that tests are still green for every supported python version, and that coverage is still at 100%, by running ``tox``
-3. Check that the :ref:`changelog:Release notes` section is correctly filled up
-4. Increase the version number in ``pyproject.toml``
-5. Commit with ``git commit``
-6. Publish with ``poetry publish --build``
-7. Tag you commit with ``git tag XX.YY.ZZ``
-8. Push the release commit and the new tag on the repository with ``git push --tags``
+3. Check that the demo environments are still working
+4. Check that the :ref:`changelog:Release notes` section is correctly filled up
+5. Increase the version number in ``pyproject.toml``
+6. Commit with ``git commit``
+7. Publish with ``poetry publish --build``
+8. Tag you commit with ``git tag XX.YY.ZZ``
+9. Push the release commit and the new tag on the repository with ``git push --tags``