diff --git a/axelrod/game.py b/axelrod/game.py
index 0d8f94380..c2b4ffc44 100644
--- a/axelrod/game.py
+++ b/axelrod/game.py
@@ -2,6 +2,7 @@
 from typing import Tuple, Union
 
 import numpy as np
+import numpy.typing as npt
 
 from axelrod import Action
 
@@ -20,7 +21,7 @@ class AsymmetricGame(object):
     """
 
     # pylint: disable=invalid-name
-    def __init__(self, A: np.array, B: np.array) -> None:
+    def __init__(self, A: npt.NDArray, B: npt.NDArray) -> None:
         """
         Creates an asymmetric game from two matrices.
 
diff --git a/axelrod/load_data_.py b/axelrod/load_data_.py
index e55f5f395..ebf464975 100644
--- a/axelrod/load_data_.py
+++ b/axelrod/load_data_.py
@@ -26,6 +26,8 @@ def load_file(filename: str, directory: str) -> List[List[str]]:
 
     path = str(pathlib.Path(directory) / filename)
     data_bytes = pkgutil.get_data(__name__, path)
+    if data_bytes is None:
+        raise FileNotFoundError(path)
     data = data_bytes.decode("UTF-8", "replace")
 
     rows = []
diff --git a/run_mypy.py b/run_mypy.py
index 94e3d669e..c0952e7e7 100755
--- a/run_mypy.py
+++ b/run_mypy.py
@@ -49,7 +49,6 @@
     "axelrod/strategies/rand.py",
     "axelrod/strategies/titfortat.py",
     "axelrod/strategies/hmm.py",
-    "axelrod/strategies/human.py",
     "axelrod/strategies/finite_state_machines.py",
     "axelrod/strategies/worse_and_worse.py",
 ]
diff --git a/tox.ini b/tox.ini
index e40c8375b..7afca6c9d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -28,8 +28,11 @@ deps =
     isort
     black
     numpy==1.26.4
+    mypy
+    types-setuptools
 commands =
     python -m pytest --cov-report term-missing --cov=axelrod --cov-fail-under=100 . --doctest-glob="*.md" --doctest-glob="*.rst"
     python -m black -l 80 . --check
     python -m isort --check-only axelrod/.
+    python run_mypy.py
     python run_strategy_indexer.py