diff --git a/pyproject.toml b/pyproject.toml
index 013b7db..3da0552 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ typer = "^0.12.3"
 click = ">=8.1,<8.2"
 matplotlib = "~3.8"
 lifelines = "^0.30"
-pyarrow = "^14"
+pyarrow = ">=14,<22"
 pyreadr = "^0.5"
 
 [tool.poetry.group.dev.dependencies]