diff --git a/src/gentropy/susie_finemapper.py b/src/gentropy/susie_finemapper.py
index cc4c7a6a1..6c2a4113c 100644
--- a/src/gentropy/susie_finemapper.py
+++ b/src/gentropy/susie_finemapper.py
@@ -125,8 +125,10 @@ def __init__(
                 output_path + "/" + study_locus_to_finemap
             )
             # Write log
-            result_logging["log"].df.write.mode(session.write_mode).parquet(
-                output_path_log + "/" + study_locus_to_finemap
+            result_logging["log"].to_parquet(
+                output_path_log + "/" + study_locus_to_finemap + ".parquet",
+                engine="pyarrow",
+                index=False
             )
         else:
             result = self.susie_finemapper_ss_gathered(