diff --git a/pyproject.toml b/pyproject.toml
index 2b6d6e3..1db3f83 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ classifiers = [
 dynamic = ["version"]
 requires-python = ">=3.10"
 dependencies = [
-    'nested-pandas>=0.3.8,<0.4.0',
+    'nested-pandas>=0.3.8,<0.5.0',
     'numpy',
     'dask>=2025.1.0',
     'dask[distributed]>=2025.2.0',