diff --git a/pyproject.toml b/pyproject.toml
index 7ae477e..3fab63c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-doc = ["myst_parser", "sphinx_rtd_theme", "sphinx"]
+doc = ["jupytext", "myst_parser", "sphinx_rtd_theme", "sphinx"]
 demo = []
 test = ["pytest"]
 lint = ["ruff"]