diff --git a/pyproject.toml b/pyproject.toml
index a30479905b..5eefd6379a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,6 +40,7 @@ dependencies = [
     "typing_extensions>=0.0.0",
     "eval_type_backport>=0.0.0",
     "polars>=0.20.22",
+    "transformers<4.57.0; python_version == '3.9'",  # https://github.com/huggingface/transformers/issues/41339
 ]