diff --git a/pyproject.toml b/pyproject.toml
index 6424fa1..3a95015 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,7 +53,8 @@ doc_build = [
   "ipykernel",
   "jupyter",
   "nbconvert",
-  "notedown"
+  "notedown",
+  "setuptools"
 ]
 
 [tool.mypy]