diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -67,7 +67,7 @@ If the versions are not correct or you don't have Node.js or pnpm installed, dow
 
 ### Installing Foundry
 
-op-viem uses [Foundry](https://book.getfoundry.sh/) for testing. We run a local [Anvil](https://github.com/foundry-rs/foundry/tree/master/anvil) instance against a forked Ethereum node, where we can also use tools like [Forge](https://book.getfoundry.sh/forge/) to deploy test contracts to it.
+op-viem uses [Foundry](https://book.getfoundry.sh/) for testing. We run a local [Anvil](https://github.com/foundry-rs/foundry/tree/master/crates/anvil) instance against a forked Ethereum node, where we can also use tools like [Forge](https://book.getfoundry.sh/forge/) to deploy test contracts to it.
 
 Install Foundry using the following command: