diff --git a/sagemaker-train/src/sagemaker/train/model_trainer.py b/sagemaker-train/src/sagemaker/train/model_trainer.py
index d07edeb025..2c0bbeba61 100644
--- a/sagemaker-train/src/sagemaker/train/model_trainer.py
+++ b/sagemaker-train/src/sagemaker/train/model_trainer.py
@@ -1053,7 +1053,7 @@ def _prepare_train_script(
             execute_driver=execute_driver,
         )
 
-        with open(os.path.join(tmp_dir.name, TRAIN_SCRIPT), "w") as f:
+        with open(os.path.join(tmp_dir.name, TRAIN_SCRIPT), "w", newline="\n" ) as f:
             f.write(train_script)
 
     @classmethod
@@ -1616,4 +1616,4 @@ def with_metric_definitions(
         """
         self._metric_definitions = metric_definitions
 
-        return self
\ No newline at end of file
+        return self