diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 60bf662..767320b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -14,17 +14,17 @@ repos:
       - id: tox-ini-fmt
         args: ["-p", "fix"]
   - repo: https://github.com/tox-dev/pyproject-fmt
-    rev: "0.13.0"
+    rev: "0.13.1"
     hooks:
       - id: pyproject-fmt
-        additional_dependencies: ["tox>=4.6.4"]
+        additional_dependencies: ["tox>=4.8"]
   - repo: https://github.com/pre-commit/mirrors-prettier
     rev: "v3.0.1"
     hooks:
       - id: prettier
         args: ["--print-width=120", "--prose-wrap=always"]
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: "v0.0.282"
+    rev: "v0.0.284"
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix]
diff --git a/pyproject.toml b/pyproject.toml
index 865d6e0..263c4ae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,11 +45,11 @@ optional-dependencies.graphviz = [
 optional-dependencies.test = [
   "covdefaults>=2.3",
   "diff-cover>=7.7",
-  "pip>=23.2",
+  "pip>=23.2.1",
   "pytest>=7.4",
   "pytest-cov>=4.1",
   "pytest-mock>=3.11.1",
-  "virtualenv<21,>=20.24",
+  "virtualenv<21,>=20.24.3",
 ]
 urls.Changelog = "https://github.com/tox-dev/pipdeptree/blob/main/CHANGES.md"
 urls.Documentation = "https://github.com/tox-dev/pipdeptree/blob/main/README.md#pipdeptree"
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 75a26d3..30b39a4 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -66,7 +66,7 @@ def test_parser_svg() -> None:
         (False, [], float("inf")),
     ],
 )
-def test_parser_depth(should_be_error: bool, depth_arg: list[str], expected_value: None | int | float) -> None:
+def test_parser_depth(should_be_error: bool, depth_arg: list[str], expected_value: None | float) -> None:
     parser = build_parser()
 
     if should_be_error:
diff --git a/tox.ini b/tox.ini
index 7ce6bc5..d98ab72 100644
--- a/tox.ini
+++ b/tox.ini
@@ -43,7 +43,7 @@ commands =
 [testenv:type]
 description = run type check on code base
 deps =
-    mypy==1.4.1
+    mypy==1.5
 set_env =
     {tty:MYPY_FORCE_COLOR = 1}
 commands =