diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 04f42d6..b313f1b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -26,10 +26,10 @@ repos:
     rev: v3.19.1
     hooks:
       - id: pyupgrade
-        args: ["--py311-plus"]
+        args: ["--py39-plus"]
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.9.5
+    rev: v0.11.5
     hooks:
       - id: ruff-format
       - id: ruff
diff --git a/discord_embed/generate_html.py b/discord_embed/generate_html.py
index f2f53d8..ffa0766 100644
--- a/discord_embed/generate_html.py
+++ b/discord_embed/generate_html.py
@@ -29,7 +29,7 @@ def generate_html_for_videos(
     Returns:
         Returns HTML for video.
     """
-    time_now: datetime.datetime = datetime.datetime.now(tz=datetime.UTC)
+    time_now: datetime.datetime = datetime.datetime.now(tz=datetime.timezone.utc)
     time_now_str: str = time_now.strftime("%Y-%m-%d %H:%M:%S %Z")
 
     video_html: str = f"""
diff --git a/noxfile.py b/noxfile.py
new file mode 100644
index 0000000..69f2b0c
--- /dev/null
+++ b/noxfile.py
@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+import nox
+
+nox.options.default_venv_backend = "uv"
+
+
+@nox.session(python=["3.9", "3.10", "3.11", "3.12", "3.13"])
+def tests(session: nox.Session) -> None:
+    """Run the test suite."""
+    # pip install .
+    session.install(".")
+    session.install("pytest", "pytest-httpx")
+    session.run("pytest")
diff --git a/pyproject.toml b/pyproject.toml
index 3186e48..abc48b4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "discord-embed"
 version = "1.0.0"
 description = "Make nice embeds for Discord"
 readme = "README.md"
-requires-python = ">=3.13"
+requires-python = ">=3.9"
 dependencies = [
   "discord-webhook",
   "fastapi",
@@ -16,7 +16,7 @@ dependencies = [
 ]
 
 [dependency-groups]
-dev = ["pytest", "httpx"]
+dev = ["pytest", "httpx", "nox"]
 
 [build-system]
 build-backend = "poetry.core.masonry.api"
@@ -30,19 +30,20 @@ authors = ["Joakim Hellsén <tlovinator@gmail.com>"]
 license = "GPL-3.0-or-later"
 
 [tool.poetry.dependencies]
-python = "^3.13"
+python = "^3.9"
 discord-webhook = "*"
 fastapi = "*"
 ffmpeg-python = "*"
 Jinja2 = "*"
 python-dotenv = "*"
 python-multipart = "*"
-sentry-sdk = {extras = ["fastapi"], version = "*"}
-uvicorn = {extras = ["standard"], version = "*"}
+sentry-sdk = { extras = ["fastapi"], version = "*" }
+uvicorn = { extras = ["standard"], version = "*" }
 
 [tool.poetry.group.dev.dependencies]
 httpx = "*"
 pytest = "*"
+nox = "*"
 
 [tool.ruff]
 preview = true