diff --git a/pyproject.toml b/pyproject.toml
index c7ed29a..ed1a0f0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ dependencies = [
     "fastapi-mcp==0.4.0",
     "mcp==1.18.0",
     "pyspark==3.5.6",
-    "delta-spark==3.3.2",
+    "delta-spark==4.0.1",
     "aiohttp==3.13.1",
     "cacheout==0.16.0",
     "minio==7.2.18",