diff --git a/pyproject.toml b/pyproject.toml
index 5c2d88cd..d1644499 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ devsim = ["devsim", "pyvista<=0.46.0", "tidy3d~=2.11.1"]
 docs = [
   "jupytext",
   "matplotlib",
-  "jupyter-book~=1.0",
+  "jupyter-book>=1,<3",
   "pyvista[all]<=0.46.0",
   "bokeh",
   "scikit-learn"