diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 75432eb..aa8dd3c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -14,7 +14,7 @@ repos:
       - id: debug-statements
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.16.3
+    rev: v0.16.5
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix]
diff --git a/README.md b/README.md
index 1940502..a38b198 100644
--- a/README.md
+++ b/README.md
@@ -67,17 +67,19 @@ async for chunk in stream:
 ```python
 from x402_openai.wallets import EvmWallet, SvmWallet
 
-client = X402OpenAI(wallets=[
-    EvmWallet(private_key="0x…"),
-    SvmWallet(private_key="base58…"),
-])
+client = X402OpenAI(
+    wallets=[
+        EvmWallet(private_key="0x…"),
+        SvmWallet(private_key="base58…"),
+    ]
+)
 ```
 
 ### BIP-39 Mnemonic (EVM)
 
 ```python
 wallet = EvmWallet(mnemonic="word1 word2 … word12")
-wallet = EvmWallet(mnemonic="…", account_index=2)                  # m/44'/60'/0'/0/2
+wallet = EvmWallet(mnemonic="…", account_index=2)  # m/44'/60'/0'/0/2
 wallet = EvmWallet(mnemonic="…", derivation_path="m/44'/60'/2'/0/0")  # custom path
 ```
 
@@ -98,8 +100,8 @@ client = X402OpenAI(
     ],
     policies=[
         prefer_network("eip155:8453"),  # Prefer Base mainnet
-        prefer_scheme("exact"),         # Prefer exact payment scheme
-        max_amount(1_000_000),          # Cap at 1 USDC (6 decimals)
+        prefer_scheme("exact"),  # Prefer exact payment scheme
+        max_amount(1_000_000),  # Cap at 1 USDC (6 decimals)
     ],
 )
 ```