diff --git a/README.md b/README.md
index e2ca765..5f69ad4 100644
--- a/README.md
+++ b/README.md
@@ -41,10 +41,11 @@ app = typer.Typer()
 
 
 @app.command()
-@use_yaml_config() # MUST BE AFTER @app.command()
-def main(...):
+@use_yaml_config()  # MUST BE AFTER @app.command()
+def main(foo: FooType):
     ...
 
+
 if __name__ == "__main__":
     app()
 ```
diff --git a/docs/index.md b/docs/index.md
index 5328655..f9a277e 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -24,16 +24,17 @@ You can use a decorator to quickly add a configuration parameter to your `typer`
 
 ```py
 import typer
-from typer_config import use_yaml_config # other formats available (1)
+from typer_config import use_yaml_config  # other formats available (1)
 
 app = typer.Typer()
 
 
 @app.command()
-@use_yaml_config() # MUST BE AFTER @app.command() (2)
-def main(...):
+@use_yaml_config()  # MUST BE AFTER @app.command() (2)
+def main(foo: FooType):
     ...
 
+
 if __name__ == "__main__":
     app()
 ```
diff --git a/duties.py b/duties.py
index b7f9181..16b5a95 100644
--- a/duties.py
+++ b/duties.py
@@ -44,7 +44,7 @@ def fmt_docs(ctx: Context):
         ctx (Context): the context instance (passed automatically).
     """
     ctx.run(
-        blacken_docs.run("docs/", exts=[".md"]),
+        blacken_docs.run("./", exts=[".md"]),
         nofail=True,
         title="Formatting docs (blacken-docs)",
     )
diff --git a/poetry.lock b/poetry.lock
index ede6537..5aa4c9c 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -99,7 +99,7 @@ uvloop = ["uvloop (>=0.15.2)"]
 
 [[package]]
 name = "blacken_docs"
-version = "1.15.0"
+version = "1.16.0"
 description = ""
 optional = false
 python-versions = ">=3.8"
@@ -112,8 +112,8 @@ black = ">=22.1.0"
 [package.source]
 type = "git"
 url = "https://github.com/maxb2/blacken-docs.git"
-reference = "fbd2ffc07e4afa42c23130489ee1ac7b06f0f1a9"
-resolved_reference = "fbd2ffc07e4afa42c23130489ee1ac7b06f0f1a9"
+reference = "81051e16aadfd6e6b67b0f498bf70978bce02e03"
+resolved_reference = "81051e16aadfd6e6b67b0f498bf70978bce02e03"
 
 [[package]]
 name = "certifi"
@@ -1817,4 +1817,4 @@ yaml = ["pyyaml"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "0cd2c05b8e931bf720dc5d38c6dfc80b64fb6bfb35db2f094b2d6f62d10ab92c"
+content-hash = "ea9e11bb2cde977a86db0c0ae4620d68086032522263795ef85e1f100fbec5f2"
diff --git a/pyproject.toml b/pyproject.toml
index 1f4cdbc..3030fda 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -74,7 +74,7 @@ mkdocstrings = {extras = ["python"], version = ">=0.21.2,<0.23.0"}
 mike = "^1.1.2"
 mkdocs-gen-files = "^0.5.0"
 pydantic = ">=1.10.7,<3.0.0"
-blacken-docs = { git = "https://github.com/maxb2/blacken-docs.git", rev = "fbd2ffc07e4afa42c23130489ee1ac7b06f0f1a9" }
+blacken-docs = { git = "https://github.com/maxb2/blacken-docs.git", rev = "81051e16aadfd6e6b67b0f498bf70978bce02e03" }
 schema = "^0.7.5"
 
 [tool.isort]