diff --git a/CHANGELOG.md b/CHANGELOG.md
index c676675..bcfb018 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,10 @@ For the purpose of determining breaking changes:
 
 - Add support for buffer protocol ([PEP 688](https://peps.python.org/pep-0688/))
 
+### :house: Internal
+
+- Upgrade dev dependencies
+
 ## [1.0.1] - 2024-04-27
 
 [1.0.1]: https://github.com/rogdham/bigxml/compare/v1.0.0...v1.0.1
diff --git a/dev-requirements.txt b/dev-requirements.txt
index cb76f0a..8e11a56 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -2,17 +2,17 @@
 -e .
 
 # build
-build==1.2.1
+build==1.2.2
 
 # docs
-mkdocs==1.6.0
+mkdocs==1.6.1
 
 # lint
-ruff==0.4.2
+ruff==0.6.9
 
 # tests
-pytest==8.1.1
+pytest==8.3.3
 pytest-cov==5.0.0
 
 # type
-mypy==1.10.0
+mypy==1.11.2
diff --git a/src/bigxml/parser.py b/src/bigxml/parser.py
index 7c1c636..0a8d909 100644
--- a/src/bigxml/parser.py
+++ b/src/bigxml/parser.py
@@ -25,7 +25,7 @@ def _parse(
         raise RuntimeError("Tried to access a node out of order")
 
     depth = 0
-    last_child: Optional["Element"] = None
+    last_child: Optional[Element] = None
 
     def handle_text() -> Iterator[T]:
         if last_child is not None:
diff --git a/tests/unit/test_handler_creator.py b/tests/unit/test_handler_creator.py
index 0bc6be9..a0ce7d6 100644
--- a/tests/unit/test_handler_creator.py
+++ b/tests/unit/test_handler_creator.py
@@ -80,7 +80,7 @@ def handle(
 def cases(
     *args: Tuple[Tuple[str, ...], Optional[str], Optional[str]],
 ) -> pytest.MarkDecorator:
-    tests: List["ParameterSet"] = []
+    tests: List[ParameterSet] = []
     for node_path, expected_text, expected_node_name in args:
         nodes = create_nodes(*node_path)
         if expected_node_name is None:
@@ -92,7 +92,7 @@ def cases(
         def test_create_handler(
             root: Union[XMLElement, XMLText],
             expected_text: Optional[str],
-            expected_node: Optional[str],
+            expected_node: Union[XMLElement, XMLText, None],
             *handles: object,
         ) -> None:
             handler = create_handler(*handles)
diff --git a/tox.ini b/tox.ini
index d88d0eb..f4eb538 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ envlist =
 package = wheel
 wheel_build_env = .pkg # reuse same wheel across envs
 deps =
-    pytest==8.1.2
+    pytest==8.3.3
     pytest-cov==5.0.0
 passenv = PY_COLORS
 setenv =
@@ -22,28 +22,28 @@ commands =
 [testenv:build]
 skip_install = true
 deps =
-    build==1.2.1
+    build==1.2.2
 commands =
     python -m build
 
 [testenv:docs]
 skip_install = true
 deps =
-    mkdocs==1.6.0
+    mkdocs==1.6.1
 commands =
     mkdocs {posargs:build} -f docs/mkdocs.yml
 
 [testenv:lint]
 deps =
-    ruff==0.4.2
+    ruff==0.6.9
 commands =
     ruff check src docs tests
     ruff format --check src docs tests
 
 [testenv:type]
 deps =
-    mypy==1.10.0
-    pytest==8.1.2 # for typing
+    mypy==1.11.2
+    pytest==8.3.3 # for typing
 commands =
     mypy
     mypy --explicit-package-bases docs tests