diff --git a/scripts/finetune_classifier.py b/scripts/finetune_classifier.py
index c70929e..e936466 100644
--- a/scripts/finetune_classifier.py
+++ b/scripts/finetune_classifier.py
@@ -310,7 +310,12 @@ def run_finetune(model_key: str, epochs: int = 5, score_files: list[Path] | None
         label2id=label2id,
     )
     if config["gradient_checkpointing"]:
-        model.gradient_checkpointing_enable()
+        # use_reentrant=False avoids "backward through graph a second time" errors
+        # when Accelerate's gradient accumulation context is layered on top.
+        # Reentrant checkpointing (the default) conflicts with Accelerate ≥ 0.27.
+        model.gradient_checkpointing_enable(
+            gradient_checkpointing_kwargs={"use_reentrant": False}
+        )
 
     # --- TrainingArguments ---
     training_args = TrainingArguments(