diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 805ce058..675e54db 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -19,7 +19,7 @@ repos:
         - test_requirements.txt
 
 - repo: https://github.com/psf/black
-  rev: 24.4.0
+  rev: 24.4.2
   hooks:
   - id: black
     language_version: python3
@@ -31,12 +31,12 @@ repos:
 
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.3.7
+  rev: v0.4.3
   hooks:
     - id: ruff
 
 - repo: https://github.com/tox-dev/pyproject-fmt
-  rev: 1.7.0
+  rev: 1.8.0
   hooks:
     - id: pyproject-fmt
 
diff --git a/compliance_checker/cf/cf_1_8.py b/compliance_checker/cf/cf_1_8.py
index 0f001a8c..9d35e56a 100644
--- a/compliance_checker/cf/cf_1_8.py
+++ b/compliance_checker/cf/cf_1_8.py
@@ -93,7 +93,7 @@ def check_groups(self, ds: Dataset):
             for attr in ginstance.ncattrs():
                 if attr in CF1_8Check.ROOT_GROUP_ONLY_ATTRS:
                     ctx_hi.messages.append(
-                        f'§2.7.2 Attribute "{ attr }" MAY ONLY be used in the root group '
+                        f'§2.7.2 Attribute "{ attr}" MAY ONLY be used in the root group '
                         "and SHALL NOT be duplicated or overridden in child groups.",
                     )
 
@@ -101,7 +101,7 @@ def check_groups(self, ds: Dataset):
 
                 elif attr in CF1_8Check.NON_ROOT_GROUP_OPT:
                     ctx_lo.messages.append(
-                        f"§2.7.2 Note: attribute '{ attr }' found on non-root group '{ gname }'. "
+                        f"§2.7.2 Note: attribute '{ attr}' found on non-root group '{ gname}'. "
                         "This is optional for non-root groups. It is allowed in order to provide additional "
                         "provenance and description of the subsidiary data. It does not override "
                         "attributes from parent groups.",