diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d4611cb..2712a77 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -14,7 +14,7 @@ repos:
         name: black
         language: system
         entry: python -m black
-        types: [python]
+        types_or: [python, pyi]
     -   id: ruff
         name: ruff
         language: system
@@ -25,7 +25,7 @@ repos:
         language: system
         require_serial: true
         entry: python -m mypy
-        types: [python]
+        types_or: [python, pyi]
     -   id: tests
         name: tests
         language: system
diff --git a/stubs/perlin_noise/rand_vec.pyi b/stubs/perlin_noise/rand_vec.pyi
index 2e138ca..8c18a58 100644
--- a/stubs/perlin_noise/rand_vec.pyi
+++ b/stubs/perlin_noise/rand_vec.pyi
@@ -1,5 +1,10 @@
 from _typeshed import Incomplete
-from perlin_noise.tools import dot as dot, fade as fade, product as product, sample_vector as sample_vector
+from perlin_noise.tools import (
+    dot as dot,
+    fade as fade,
+    product as product,
+    sample_vector as sample_vector,
+)
 from typing import List, Tuple
 
 class RandVec:
diff --git a/stubs/perlin_noise/tools.pyi b/stubs/perlin_noise/tools.pyi
index 3fce469..f9e5290 100644
--- a/stubs/perlin_noise/tools.pyi
+++ b/stubs/perlin_noise/tools.pyi
@@ -5,4 +5,6 @@ def sample_vector(dimensions: int, seed: int) -> List[float]: ...
 def fade(given_value: float) -> float: ...
 def hasher(coors: Tuple[int]) -> int: ...
 def product(iterable: Union[List, Tuple]) -> float: ...
-def each_with_each(arrays: List[Tuple[int, int]], prev=...) -> Generator[Tuple[int], None, None]: ...
+def each_with_each(
+    arrays: List[Tuple[int, int]], prev=...
+) -> Generator[Tuple[int], None, None]: ...