diff --git a/README.md b/README.md
index ec824b3..b7548c0 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 [![codecov](https://codecov.io/gh/hyperspy/holospy/graph/badge.svg?token=XB1QDTXQ86)](https://codecov.io/gh/hyperspy/holospy)
 [![Docs](https://readthedocs.org/projects/holospy/badge/?version=latest)](https://holospy.readthedocs.io/en/latest/?badge=latest)
 [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
+[![DOI](https://zenodo.org/badge/2233998.svg)](https://zenodo.org/badge/latestdoi/2233998)
 
 **HoloSpy** is a Python package extending the functionality for multi-dimensional
 data analysis provided by the [HyperSpy](https://hyperspy.org) library. It is
diff --git a/pyproject.toml b/pyproject.toml
index 128ea80..43ba6f4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,6 +56,7 @@ doc = [
   "numpydoc",
   "pydata-sphinx-theme>=0.13",
   "sphinx",
+  "sphinx-design",
   "sphinx-favicon",
   "sphinxcontrib-towncrier",
   "towncrier",