diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 54daa817..2590888d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -33,7 +33,7 @@ repos:
         args:
           - --strict
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.8.6
+    rev: v0.9.1
     hooks:
       - id: ruff
       - id: ruff-format
diff --git a/glass/core/array.py b/glass/core/array.py
index 4c89abdb..2f043cf3 100644
--- a/glass/core/array.py
+++ b/glass/core/array.py
@@ -1,4 +1,4 @@
-"""Module for array utilities."""
+"""Module for array utilities."""  # noqa: A005
 
 from __future__ import annotations
 
diff --git a/glass/fields.py b/glass/fields.py
index 4cd2488f..5adce6ea 100644
--- a/glass/fields.py
+++ b/glass/fields.py
@@ -579,7 +579,7 @@ def effective_cls(
     shape1, shape2 = weights1.shape, weights2.shape
     for i, shape in enumerate((shape1, shape2)):
         if not shape or shape[0] != n:
-            msg = f"shape mismatch between fields and weights{i+1}"
+            msg = f"shape mismatch between fields and weights{i + 1}"
             raise ValueError(msg)
 
     # get the iterator over leading weight axes