diff --git a/pyproject.toml b/pyproject.toml
index 6680ad4a0..e3460ab5c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["jupyter_packaging~=0.12.0", "jupyterlab<4"]
+requires = ["jupyter_packaging~=0.12.0", "jupyterlab<5"]
 build-backend = "jupyter_packaging.build_api"
 
 [tool.jupyter-packaging.options]