diff --git a/.flake8 b/.flake8
index 2b20931..ca2967e 100644
--- a/.flake8
+++ b/.flake8
@@ -28,6 +28,8 @@ ignore =
     E128,
     # unexpected indentation
     E116,
+    # continuation line unaligned for hanging indent
+    E131,
     # too many blank lines
     E303,
     # missing whitespace around arithmetic operator
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d542b3e..6043593 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -14,6 +14,11 @@ repos:
         additional_dependencies:
           - tomli
 
+  - repo: https://github.com/pycqa/flake8
+    rev: 7.1.2
+    hooks:
+      - id: flake8
+  
   - repo: https://github.com/tox-dev/pyproject-fmt
     rev: v2.5.1
     hooks:
diff --git a/cpplint_unittest.py b/cpplint_unittest.py
index 08eb375..c0a4010 100755
--- a/cpplint_unittest.py
+++ b/cpplint_unittest.py
@@ -231,6 +231,7 @@ def PerformIncludeWhatYouUse(self, code, filename='foo.h', io=codecs):
   # Perform lint and make sure one of the errors is what we want
   def TestLintContains(self, code, expected_message):
     self.assertTrue(expected_message in self.PerformSingleLineLint(code))
+
   def TestLintNotContains(self, code, expected_message):
     self.assertFalse(expected_message in self.PerformSingleLineLint(code))
 
@@ -1150,7 +1151,7 @@ def testIncludeWhatYouUse(self):
         """#include "base/foobar.h"
            boost::range::transform(input, std::back_inserter(output), square);
         """,
-        '') # Avoid false positives on transform in other namespaces.
+        '')  # Avoid false positives on transform in other namespaces.
     self.TestIncludeWhatYouUse(
         """#include "base/foobar.h"
            bool foobar = std::min_element(a.begin(), a.end());
diff --git a/pyproject.toml b/pyproject.toml
index 91f944a..b6236e8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,6 @@ classifiers = [
 dependencies = [  ]
 
 optional-dependencies.dev = [
-  "flake8>=4.0.1",
   "parameterized",
   "pylint>=2.11",
   "pytest",
diff --git a/tox.ini b/tox.ini
index 1fc6c00..db55440 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,4 +8,3 @@ extras = dev
 commands =
   {envpython} -m pytest {posargs:}
   {envpython} -m pylint cpplint.py
-  {envpython} -m flake8 cpplint.py