diff --git a/src/logging/task_tracer.py b/src/logging/task_tracer.py
index 6a561fe..f10fc20 100644
--- a/src/logging/task_tracer.py
+++ b/src/logging/task_tracer.py
@@ -116,7 +116,7 @@ def save(self):
         try:
             if not self.log_path.exists():
                 self.log_path.parent.mkdir(exist_ok=True, parents=True)
-            with open(self.log_path, mode="w") as dest:
+            with open(self.log_path, mode="w", encoding='utf8') as dest:
                 dest.write(self.model_dump_json(indent=2))
         except Exception as e:
             logger.error(e, stack_info=True, exc_info=True)
diff --git a/utils/prepare_benchmark/main.py b/utils/prepare_benchmark/main.py
index 1af6b9f..f6c23bf 100644
--- a/utils/prepare_benchmark/main.py
+++ b/utils/prepare_benchmark/main.py
@@ -174,7 +174,7 @@ def get(dataset: str):
     ds_gen = _prepare_dataset(env, dataset)
     _prepare_filesystem(env)
     ds_file = env.data_dir / dataset / env.meta_filename
-    with open(ds_file, mode="w") as f:
+    with open(ds_file, mode="w", encoding='utf8') as f:
         for task in ds_gen():
             f.write(task.to_json().decode() + "\n")
     print("\n" + "=" * 80)