diff --git a/README.md b/README.md
index 419a038786..167d2b4bd6 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ An extremely fast Python linter, written in Rust.
 * 🤝  Python 3.11 compatibility
 * 📦  Built-in caching, to avoid re-analyzing unchanged files
 * 🔧  Autofix support, for automatic error correction (e.g., automatically remove unused imports)
-* 📏  Over [400 built-in rules](https://beta.ruff.rs/docs/rules/) (and growing)
+* 📏  Over [500 built-in rules](https://beta.ruff.rs/docs/rules/) (and growing)
 * ⚖️  [Near-parity](https://beta.ruff.rs/docs/faq/#how-does-ruff-compare-to-flake8) with the built-in Flake8 rule set
 * 🔌  Native re-implementations of dozens of Flake8 plugins, like flake8-bugbear
 * ⌨️  First-party editor integrations for [VS Code](https://github.com/charliermarsh/ruff-vscode) and [more](https://github.com/charliermarsh/ruff-lsp)
@@ -216,7 +216,7 @@ linting command.
 
 <!-- Begin section: Rules -->
 
-**Ruff supports over 400 lint rules**, many of which are inspired by popular tools like Flake8,
+**Ruff supports over 500 lint rules**, many of which are inspired by popular tools like Flake8,
 isort, pyupgrade, and others. Regardless of the rule's origin, Ruff re-implements every rule in
 Rust as a first-party feature.