diff --git a/car-mirror/src/common.rs b/car-mirror/src/common.rs
index 3816cfb..aeac4d2 100644
--- a/car-mirror/src/common.rs
+++ b/car-mirror/src/common.rs
@@ -1,3 +1,5 @@
+#![allow(unknown_lints)] // Because the `instrument` macro contains some `#[allow]`s that rust 1.66 doesn't know yet.
+
 use anyhow::anyhow;
 use bytes::Bytes;
 use deterministic_bloom::runtime_size::BloomFilter;
diff --git a/car-mirror/src/incremental_verification.rs b/car-mirror/src/incremental_verification.rs
index 04f7152..8c46009 100644
--- a/car-mirror/src/incremental_verification.rs
+++ b/car-mirror/src/incremental_verification.rs
@@ -1,3 +1,5 @@
+#![allow(unknown_lints)] // Because the `instrument` macro contains some `#[allow]`s that rust 1.66 doesn't know yet.
+
 use crate::{
     dag_walk::DagWalk,
     error::{Error, IncrementalVerificationError},