diff --git a/demo/billing/src/main.rs b/demo/billing/src/main.rs
index c828370bbb22..e9e4aa337bb3 100644
--- a/demo/billing/src/main.rs
+++ b/demo/billing/src/main.rs
@@ -16,7 +16,7 @@
 //! Further details can be found on the Materialize docs:
 //! <https://materialize.com/docs/demos/microservice/>
 
-#![deny(missing_debug_implementations, missing_docs)]
+#![warn(missing_debug_implementations, missing_docs)]
 
 use std::process;
 use std::sync::Arc;
diff --git a/src/aws-util/src/lib.rs b/src/aws-util/src/lib.rs
index 15cd00835d7f..0063757b1f84 100644
--- a/src/aws-util/src/lib.rs
+++ b/src/aws-util/src/lib.rs
@@ -9,7 +9,7 @@
 
 //! Internal AWS utility library for Materialize.
 
-#![deny(missing_docs, missing_debug_implementations)]
+#![warn(missing_docs, missing_debug_implementations)]
 
 pub mod aws;
 pub mod client;
diff --git a/src/ccsr/src/lib.rs b/src/ccsr/src/lib.rs
index a422250ccb38..550ad674da1c 100644
--- a/src/ccsr/src/lib.rs
+++ b/src/ccsr/src/lib.rs
@@ -7,7 +7,7 @@
 // the Business Source License, use of this software will be governed
 // by the Apache License, Version 2.0.
 
-#![deny(missing_debug_implementations)]
+#![warn(missing_debug_implementations)]
 
 //! The `ccsr` crate provides an ergonomic API client for Confluent-compatible
 //! schema registries (CCSRs).
diff --git a/src/coord/src/session.rs b/src/coord/src/session.rs
index 86976a8a0df5..3ab3830b031e 100644
--- a/src/coord/src/session.rs
+++ b/src/coord/src/session.rs
@@ -9,7 +9,7 @@
 
 //! Per-connection configuration parameters and state.
 
-#![forbid(missing_docs)]
+#![warn(missing_docs)]
 
 use std::collections::HashMap;
 use std::mem;
diff --git a/src/dataflow/src/lib.rs b/src/dataflow/src/lib.rs
index 803ed9839f21..17aef3df83ff 100644
--- a/src/dataflow/src/lib.rs
+++ b/src/dataflow/src/lib.rs
@@ -7,7 +7,7 @@
 // the Business Source License, use of this software will be governed
 // by the Apache License, Version 2.0.
 
-#![forbid(missing_docs)]
+#![warn(missing_docs)]
 
 //! Driver for timely/differential dataflow.
 
diff --git a/src/expr/src/lib.rs b/src/expr/src/lib.rs
index 29b492ec558a..c8d7d5b9591e 100644
--- a/src/expr/src/lib.rs
+++ b/src/expr/src/lib.rs
@@ -9,7 +9,7 @@
 
 //! Core expression language.
 
-#![deny(missing_debug_implementations)]
+#![warn(missing_debug_implementations)]
 
 use std::fmt;
 use std::ops::Deref;
diff --git a/src/expr/src/relation/mod.rs b/src/expr/src/relation/mod.rs
index 9d437e4a931b..4e627b3c98b1 100644
--- a/src/expr/src/relation/mod.rs
+++ b/src/expr/src/relation/mod.rs
@@ -7,7 +7,7 @@
 // the Business Source License, use of this software will be governed
 // by the Apache License, Version 2.0.
 
-#![deny(missing_docs)]
+#![warn(missing_docs)]
 
 use std::cmp::Ordering;
 use std::collections::HashSet;
diff --git a/src/http-proxy/src/lib.rs b/src/http-proxy/src/lib.rs
index 54bae8aa38e6..a68f075aceec 100644
--- a/src/http-proxy/src/lib.rs
+++ b/src/http-proxy/src/lib.rs
@@ -13,7 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![deny(missing_docs)]
+#![warn(missing_docs)]
 #![cfg_attr(nightly_doc_features, feature(doc_cfg))]
 
 //! [<img src="https://materialize.com/wp-content/uploads/2020/01/materialize_logo_primary.png" width=180 align=right>](https://materialize.com)
diff --git a/src/interchange/src/lib.rs b/src/interchange/src/lib.rs
index 0b1544ea1648..312fbb1d4ac1 100644
--- a/src/interchange/src/lib.rs
+++ b/src/interchange/src/lib.rs
@@ -9,7 +9,7 @@
 
 //! Translations for various data serialization formats.
 
-#![deny(missing_debug_implementations)]
+#![warn(missing_debug_implementations)]
 
 pub mod avro;
 pub mod encode;
diff --git a/src/kafka-util/src/lib.rs b/src/kafka-util/src/lib.rs
index f2a0a8aecee5..9d0c8edf3d47 100644
--- a/src/kafka-util/src/lib.rs
+++ b/src/kafka-util/src/lib.rs
@@ -7,7 +7,7 @@
 // the Business Source License, use of this software will be governed
 // by the Apache License, Version 2.0.
 
-#![deny(missing_docs)]
+#![warn(missing_docs)]
 
 //! Utilities for working with Kafka.
 
diff --git a/src/metabase/src/lib.rs b/src/metabase/src/lib.rs
index 4fa1ac7acdfd..5e83a2c1e1e7 100644
--- a/src/metabase/src/lib.rs
+++ b/src/metabase/src/lib.rs
@@ -18,7 +18,7 @@
 //!
 //! [Metabase]: https://metabase.com
 
-#![deny(missing_debug_implementations)]
+#![warn(missing_debug_implementations)]
 
 use std::fmt;
 use std::time::Duration;
diff --git a/src/ore/src/lib.rs b/src/ore/src/lib.rs
index b79e6c12b8e2..b47d93a6d7c2 100644
--- a/src/ore/src/lib.rs
+++ b/src/ore/src/lib.rs
@@ -19,7 +19,7 @@
 //! Modules are included in this crate when they are broadly useful but too
 //! small to warrant their own crate.
 
-#![deny(missing_docs, missing_debug_implementations)]
+#![warn(missing_docs, missing_debug_implementations)]
 
 #[cfg(feature = "test")]
 pub mod assert;
diff --git a/src/pgrepr/src/lib.rs b/src/pgrepr/src/lib.rs
index ff595cb0dbfc..88dee89e2827 100644
--- a/src/pgrepr/src/lib.rs
+++ b/src/pgrepr/src/lib.rs
@@ -16,8 +16,8 @@
 //! `Value`s are easily converted to and from [`repr::Datum`]s. See, for
 //! example, the [`values_from_row`] function.
 
-#![deny(clippy::as_conversions)]
-#![deny(missing_docs)]
+#![warn(clippy::as_conversions)]
+#![warn(missing_docs)]
 
 mod format;
 mod types;
diff --git a/src/pgwire/src/lib.rs b/src/pgwire/src/lib.rs
index a3b4554849c7..09d2ae2ba552 100644
--- a/src/pgwire/src/lib.rs
+++ b/src/pgwire/src/lib.rs
@@ -20,7 +20,7 @@
 //!   * [CockroachDB pgwire implementation](https://github.com/cockroachdb/cockroach/tree/master/pkg/sql/pgwire)
 //!   * ["Postgres on the wire" PGCon talk](https://www.pgcon.org/2014/schedule/attachments/330_postgres-for-the-wire.pdf)
 
-#![deny(clippy::as_conversions)]
+#![warn(clippy::as_conversions)]
 
 mod codec;
 mod message;
diff --git a/src/protoc/src/lib.rs b/src/protoc/src/lib.rs
index 982e6b21813d..e6b7da1f442f 100644
--- a/src/protoc/src/lib.rs
+++ b/src/protoc/src/lib.rs
@@ -7,7 +7,7 @@
 // the Business Source License, use of this software will be governed
 // by the Apache License, Version 2.0.
 
-#![forbid(missing_docs)]
+#![warn(missing_docs)]
 
 //! A pure Rust protobuf compiler.
 //!
diff --git a/src/repr/src/lib.rs b/src/repr/src/lib.rs
index 589a692f3caf..5e9c5a22d10c 100644
--- a/src/repr/src/lib.rs
+++ b/src/repr/src/lib.rs
@@ -20,7 +20,7 @@
 //! * [`RelationDesc`] describes what it takes to extend a `Row` vertically, and
 //!   corresponds most closely to what is returned from querying our dataflows
 
-#![deny(missing_debug_implementations)]
+#![warn(missing_debug_implementations)]
 
 mod relation;
 mod row;
diff --git a/src/sql/src/catalog.rs b/src/sql/src/catalog.rs
index 7e9ea1798718..ea033834f2b2 100644
--- a/src/sql/src/catalog.rs
+++ b/src/sql/src/catalog.rs
@@ -7,7 +7,7 @@
 // the Business Source License, use of this software will be governed
 // by the Apache License, Version 2.0.
 
-#![forbid(missing_docs)]
+#![warn(missing_docs)]
 
 //! Catalog abstraction layer.
 
diff --git a/src/sql/src/lib.rs b/src/sql/src/lib.rs
index 9f6bac97861d..1b544a6d464f 100644
--- a/src/sql/src/lib.rs
+++ b/src/sql/src/lib.rs
@@ -63,7 +63,7 @@
 //!
 //! [`Plan`]: crate::plan::Plan
 
-#![deny(missing_debug_implementations)]
+#![warn(missing_debug_implementations)]
 
 macro_rules! unsupported {
     ($feature:expr) => {
diff --git a/src/testdrive/src/lib.rs b/src/testdrive/src/lib.rs
index 9e123676e7f0..93d98402d1a5 100644
--- a/src/testdrive/src/lib.rs
+++ b/src/testdrive/src/lib.rs
@@ -9,7 +9,7 @@
 
 //! Integration test driver for Materialize.
 
-#![deny(missing_docs)]
+#![warn(missing_docs)]
 
 use std::fs::File;
 use std::io::{self, Read};
diff --git a/src/transform/src/lib.rs b/src/transform/src/lib.rs
index 8820b9ba017b..4ea28aaaa0ef 100644
--- a/src/transform/src/lib.rs
+++ b/src/transform/src/lib.rs
@@ -18,8 +18,8 @@
 //! The crate also contains the beginnings of whole-dataflow optimization,
 //! which uses the same analyses but spanning multiple dataflow elements.
 
-#![forbid(missing_docs)]
-#![deny(missing_debug_implementations)]
+#![warn(missing_docs)]
+#![warn(missing_debug_implementations)]
 
 use std::collections::HashMap;
 use std::error::Error;
diff --git a/test/performance/perf-upsert/src/main.rs b/test/performance/perf-upsert/src/main.rs
index 5f31d59cd3f1..d5ad806000d5 100644
--- a/test/performance/perf-upsert/src/main.rs
+++ b/test/performance/perf-upsert/src/main.rs
@@ -9,7 +9,7 @@
 
 //! Performance test for Materialize Upsert sources
 
-#![deny(missing_debug_implementations, missing_docs)]
+#![warn(missing_debug_implementations, missing_docs)]
 
 use std::process;
 use std::sync::Arc;
diff --git a/test/smith/src/main.rs b/test/smith/src/main.rs
index d7cf3f6111e2..d0a346c26481 100644
--- a/test/smith/src/main.rs
+++ b/test/smith/src/main.rs
@@ -10,7 +10,7 @@
 //! Fuzz test Materialize using the Smith fuzzer
 //! available at <https://api.jibson.dev/smith>
 
-#![deny(missing_debug_implementations, missing_docs)]
+#![warn(missing_debug_implementations, missing_docs)]
 
 use std::process;