diff --git a/gpt_engineer/steps.py b/gpt_engineer/steps.py
index 0e9cd6b..31f0b6e 100644
--- a/gpt_engineer/steps.py
+++ b/gpt_engineer/steps.py
@@ -3,7 +3,7 @@ import re
 import subprocess
 
 from enum import Enum
-from typing import Callable, TypeVar
+from typing import Callable, List, TypeVar
 
 from gpt_engineer.ai import AI
 from gpt_engineer.chat_to_files import to_files
@@ -16,7 +16,7 @@ def setup_sys_prompt(dbs):
     )
 
 
-Step = TypeVar("Step", bound=Callable[[AI, DBs], list[dict]])
+Step = TypeVar("Step", bound=Callable[[AI, DBs], List[dict]])
 
 
 def simple_gen(ai: AI, dbs: DBs):
diff --git a/scripts/benchmark.py b/scripts/benchmark.py
index cde4957..ac130bb 100644
--- a/scripts/benchmark.py
+++ b/scripts/benchmark.py
@@ -6,13 +6,13 @@ import subprocess
 
 from itertools import islice
 from pathlib import Path
-from typing import Iterable
+from typing import Iterable, Union
 
 from typer import run
 
 
 def main(
-    n_benchmarks: int | None = None,
+    n_benchmarks: Union[int, None] = None,
 ):
     path = Path("benchmark")
 
diff --git a/scripts/rerun_edited_message_logs.py b/scripts/rerun_edited_message_logs.py
index 2bf4409..8d9b258 100644
--- a/scripts/rerun_edited_message_logs.py
+++ b/scripts/rerun_edited_message_logs.py
@@ -1,6 +1,8 @@
 import json
 import pathlib
 
+from typing import Union
+
 import typer
 
 from gpt_engineer.ai import AI
@@ -12,7 +14,7 @@ app = typer.Typer()
 @app.command()
 def main(
     messages_path: str,
-    out_path: str | None = None,
+    out_path: Union[str, None] = None,
     model: str = "gpt-4",
     temperature: float = 0.1,
 ):