diff --git a/pyproject.toml b/pyproject.toml
index eb8d61df..825b35cb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ docs = [
     "ipykernel",
     "daft",
     "linkify-it-py",
-    "myst-nb",
+    "myst-nb<=1.0.0",
     "pathlib",
     "sphinx",
     "sphinx-autodoc-typehints",