diff --git a/requirements_dev.txt b/requirements_dev.txt
index 012c6c9..048207b 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -26,6 +26,7 @@ seaborn
 shapely
 sphinx
 sphinx-autoapi
+sphinx_design
 sphinx-gallery
 sphinx-rtd-theme
 sphinx_copybutton
diff --git a/setup.cfg b/setup.cfg
index 657f79b..4b4acd0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -74,6 +74,7 @@ dev =
     shapely
     sphinx
     sphinx-autoapi
+    sphinx_design
     sphinx-gallery
     sphinx-rtd-theme
     sphinx_copybutton