diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index a3d03bf..c573655 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -30,7 +30,7 @@ repos:
         entry: uv run ruff format --force-exclude --exit-non-zero-on-format
         require_serial: true
         language: unsupported
-        types: [python]
+        types_or: [python, markdown]
 
       - id: local-mypy
         name: mypy check
diff --git a/README.md b/README.md
index 0698b1e..89b2df0 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,7 @@ from typing import Annotated
 
 from annotated_doc import Doc
 
+
 def hi(name: Annotated[str, Doc("Who to say hi to")]) -> None:
     print(f"Hi, {name}!")
 ```
@@ -49,6 +50,7 @@ from typing import Annotated
 
 from annotated_doc import Doc
 
+
 class User:
     name: Annotated[str, Doc("The user's name")]
     age: Annotated[int, Doc("The user's age")]
diff --git a/pyproject.toml b/pyproject.toml
index 0052712..67eeae0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,7 +49,7 @@ tests = [
     "coverage[toml]>=7.6.1",
     "mypy==1.14.1",
     "pytest>=8.3.5",
-    "ruff>=0.15.14",
+    "ruff>=0.16.0",
     "smokeshow>=0.5.0",
     "ty>=0.0.25",
     "typer>=0.16.1",
diff --git a/uv.lock b/uv.lock
index 71e1126..7331afc 100644
--- a/uv.lock
+++ b/uv.lock
@@ -47,7 +47,7 @@ dev = [
     { name = "mypy", specifier = "==1.14.1" },
     { name = "prek", specifier = ">=0.2.24,<1.0.0" },
     { name = "pytest", specifier = ">=8.3.5" },
-    { name = "ruff", specifier = ">=0.15.14" },
+    { name = "ruff", specifier = ">=0.16.0" },
     { name = "smokeshow", specifier = ">=0.5.0" },
     { name = "ty", specifier = ">=0.0.25" },
     { name = "typer", specifier = ">=0.16.1" },
@@ -57,7 +57,7 @@ tests = [
     { name = "coverage", extras = ["toml"], specifier = ">=7.6.1" },
     { name = "mypy", specifier = "==1.14.1" },
     { name = "pytest", specifier = ">=8.3.5" },
-    { name = "ruff", specifier = ">=0.15.14" },
+    { name = "ruff", specifier = ">=0.16.0" },
     { name = "smokeshow", specifier = ">=0.5.0" },
     { name = "ty", specifier = ">=0.0.25" },
     { name = "typer", specifier = ">=0.16.1" },