diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8b42752..577c914 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,18 +30,18 @@ jobs:
       - name: Lint
         run: |
           poetry run pre-commit run --all-files
-          poetry run cz check --rev-range $(git describe --tags --abbrev=0)..HEAD
+          poetry run cz check --rev-range "$(git describe --tags --abbrev=0)..HEAD"
 
   test:
     runs-on: ${{ matrix.platform }}
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         platform: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:
       - uses: actions/checkout@v4
-      - uses: FedericoCarboni/setup-ffmpeg@v3
+      - uses: AnimMouse/setup-ffmpeg@v1
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
@@ -82,7 +82,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: FedericoCarboni/setup-ffmpeg@v3
+      - uses: AnimMouse/setup-ffmpeg@v1
 
       - name: Set up Python
         uses: actions/setup-python@v5
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ad67d0a..a19b56a 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,4 +1,4 @@
-default_stages: [commit]
+default_stages: [pre-commit]
 
 repos:
   - repo: local
diff --git a/moe_transcode/transcode_core.py b/moe_transcode/transcode_core.py
index 0cea10a..ff04180 100644
--- a/moe_transcode/transcode_core.py
+++ b/moe_transcode/transcode_core.py
@@ -28,7 +28,9 @@
 @moe.hookimpl
 def add_config_validator(settings: dynaconf.base.LazySettings):
     """Validate move plugin configuration settings."""
-    settings.validators.register(
+    assert isinstance(settings.library_path, str)
+
+    settings.validators.register(  # type: ignore
         dynaconf.Validator(
             "TRANSCODE.TRANSCODE_PATH",
             default=Path(settings.library_path) / "transcode",
diff --git a/pyproject.toml b/pyproject.toml
index b7c6f85..4e25df1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,13 +8,14 @@ license = "MIT"
 readme = "README.rst"
 
 [tool.poetry.dependencies]
-python = ">=3.9,<3.13"
+python = ">=3.9,<3.14"
 moe = "^2.0.0"
 
 [tool.poetry.group.test.dependencies]
 debugpy = "^1.4.1"
 pytest = "^8.0.0"
-pytest-cov = "^4.0.0"
+pytest-cov = "^6.0.0"
+tox = "^4.0.0"
 
 [tool.poetry.group.lint.dependencies]
 black = "^24.0.0"
@@ -25,12 +26,12 @@ flake8-alphabetize = "^0.0.19"
 flake8-bugbear = "^24.0.0"
 flake8-comprehensions = "^3.10.0"
 flake8-docstrings = "^1.5.0"
-flake8-pytest-style = "^1.6.0"
+flake8-pytest-style = "^2.0.0"
 flake8-use-fstring = "^1.1"
-"github3.py" = "^3.2.0"
+"github3.py" = "^4.0.0"
 isort = "^5.10.1"
 mccabe = "^0.7.0"
-pre-commit = "^3.0.0"
+pre-commit = "^4.0.0"
 pyright = "^1.1.267"
 
 [tool.poetry.group.docs.dependencies]
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..d5353a5
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,29 @@
+[tox]
+skipsdist= true
+envlist = py{39,310,311,312,313}-test, docs, lint
+
+[testenv]
+description = unit tests
+skip_install = true
+allowlist_externals = poetry, echo
+commands_pre =
+    poetry install --without docs,lint
+commands = poetry run pytest {posargs}
+
+[testenv:lint]
+description = lint tests
+basepython = 3.13
+commands_pre =
+    poetry install
+commands =
+    poetry run pre-commit run --all-files
+    poetry run cz check --rev-range "$(git describe --tags --abbrev=0)..HEAD"
+
+[testenv:docs]
+description = docs tests
+basepython = 3.13
+skip_install = true
+allowlist_externals = poetry
+commands_pre =
+    poetry install --without lint,test
+commands = poetry run sphinx-build -W -b html docs {envtmpdir}/html {posargs}