diff --git a/pyproject.toml b/pyproject.toml
index 4610bc5..1c1dc0c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,6 +32,8 @@ python = ">=3.7,<4.0"
 pelican = ">=4.5"
 markdown = {version = ">=3.2.2", optional = true}
 beautifulsoup4 = "^4.9.3"
+# Avoid PyPI/Poetry problem: https://github.com/python-poetry/poetry/issues/9293
+docutils = "!=0.21.post1"
 
 [tool.poetry.dev-dependencies]
 black = ">=22.3.0"