diff --git a/python/geobrix/pyproject.toml b/python/geobrix/pyproject.toml
index dd8afe7..74f75f4 100644
--- a/python/geobrix/pyproject.toml
+++ b/python/geobrix/pyproject.toml
@@ -19,7 +19,7 @@ classifiers = [
     'Operating System :: OS Independent'
 ]
 dependencies = [
-    "pyspark>=4.0.0",
+    "pyspark>=4.1.1",
 ]
 
 [project.urls]