diff --git a/Cargo.lock b/Cargo.lock
index ed9d844..ceaabb2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1022,7 +1022,7 @@ checksum = "dc897dd8d9e8bd1ed8cdad82b5966c3e0ecae09fb1907d58efaa013543185d0a"
 
 [[package]]
 name = "ruff-format"
-version = "0.5.0"
+version = "0.5.1"
 dependencies = [
  "pyo3",
  "ruff_python_formatter",
diff --git a/Cargo.toml b/Cargo.toml
index 109ab50..bad0eaf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruff-format"
-version = "0.5.0"
+version = "0.5.1"
 edition = "2024"
 license = "MIT"
 readme = "README.md"
diff --git a/README.md b/README.md
index 951ba70..ea26ecf 100644
--- a/README.md
+++ b/README.md
@@ -15,17 +15,26 @@ pip install ruff-format
 ## Usage
 
 ```python
-from ruff_format import format_string, is_valid_syntax
+from ruff_format import format_string, is_valid_syntax, parse_code
 
 code = """
 def hello(  x,y,   z  ):
     print( x+y+z )
 """
 
+# Check if code has valid syntax
 assert is_valid_syntax(code)
 
+# Parse code (raises RuntimeError on syntax errors)
+parse_code(code)
+
+# Format code (default line width: 80)
 formatted = format_string(code)
 print(formatted)
+
+# Format with a custom line width
+formatted = format_string(code, line_width=120)
+print(formatted)
 ```
 
 ## Development
diff --git a/pyproject.toml b/pyproject.toml
index a21156f..af98f7a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,6 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "ruff-format"
+description = "Python bindings for the Ruff code formatter, built with Rust and PyO3."
 requires-python = ">=3.8"
 license = { text = "MIT" }
 classifiers = [
diff --git a/ruff_format.pyi b/ruff_format.pyi
index 467ddb1..e9c0672 100644
--- a/ruff_format.pyi
+++ b/ruff_format.pyi
@@ -18,7 +18,7 @@ def is_valid_syntax(code: str) -> bool:
         True if the code has valid syntax, False otherwise.
     """
 
-def format_string(code: str, *, line_width: int) -> str:
+def format_string(code: str, *, line_width: int = 80) -> str:
     """Format a Python code string using Ruff.
 
     Args: