diff --git a/pyproject.toml b/pyproject.toml
index e9782e91..979221bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -82,7 +82,7 @@ optional-dependencies.ipy = [
   "ipywidgets>=8.1.8,<8.2",
 ]
 optional-dependencies.notebooks = [
-  "ipykernel>=7.2,<7.3",
+  "ipykernel>=7.2,<7.4",
   "jupytext>=1.19.3,<1.20",
   # Notebook conversion needs the IPython display helpers
   # (`c.plot()` lazy-imports kfactory.widgets.interactive, which