diff --git a/src/davinci_functions/__init__.py b/src/davinci_functions/__init__.py
index d244103..df5556d 100644
--- a/src/davinci_functions/__init__.py
+++ b/src/davinci_functions/__init__.py
@@ -1,5 +1,7 @@
 """Package definition."""
 
+from __future__ import annotations
+
 try:
     from davinci_functions import _version
 
diff --git a/src/davinci_functions/_judge.py b/src/davinci_functions/_judge.py
index 980a89b..977865b 100644
--- a/src/davinci_functions/_judge.py
+++ b/src/davinci_functions/_judge.py
@@ -1,5 +1,7 @@
 """implementation of `judge` function."""
 
+from __future__ import annotations
+
 import ast
 import textwrap
 
diff --git a/src/davinci_functions/_judge_test.py b/src/davinci_functions/_judge_test.py
index 4ac49ed..a2815b5 100644
--- a/src/davinci_functions/_judge_test.py
+++ b/src/davinci_functions/_judge_test.py
@@ -1,5 +1,7 @@
 """Tests for davinci_functions._judge."""
 
+from __future__ import annotations
+
 import pytest
 import pytest_mock
 
diff --git a/src/davinci_functions/_list.py b/src/davinci_functions/_list.py
index 9fe46a3..2514558 100644
--- a/src/davinci_functions/_list.py
+++ b/src/davinci_functions/_list.py
@@ -1,5 +1,7 @@
 """implementation of `list` function."""
 
+from __future__ import annotations
+
 import ast
 import builtins
 import textwrap
diff --git a/src/davinci_functions/_list_test.py b/src/davinci_functions/_list_test.py
index 3cd4965..4f8b713 100644
--- a/src/davinci_functions/_list_test.py
+++ b/src/davinci_functions/_list_test.py
@@ -1,5 +1,7 @@
 """Tests for davinci_functions._list."""
 
+from __future__ import annotations
+
 import pytest
 import pytest_mock