diff --git a/pyproject.toml b/pyproject.toml
index 5ec49b4..b2bd1a9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ dependencies = [
 [project.optional-dependencies]
 docs = [
 	"docutils==0.17.1", # pinned to docutils==0.17.1 due to https://github.com/worldbank/template/issues/60. See also: https://jupyterbook.org/en/stable/content/citations.html?highlight=docutils#citations-and-bibliographies
-	"jupyter-book>=1,<2",
+	"jupyter-book>=1,<3",
 ]
 
 [project.urls]