diff --git a/.github/workflows/pull-request-bot.yml b/.github/workflows/pull-request-bot.yml
index fc5d0110c5293e08f02d51264193a1f759ed5982..313e8e8ee56dcf906176cd415380cc44f1b8149a 100644
--- a/.github/workflows/pull-request-bot.yml
+++ b/.github/workflows/pull-request-bot.yml
@@ -30,7 +30,7 @@ env:
   apt_dependencies: libssl-dev gnuplot jq
   java_version: 11
   rust_toolchain_components: clippy,rustfmt
-  rust_nightly_version: nightly-2023-10-10
+  rust_nightly_version: nightly-2024-02-07
 
 jobs:
   generate-diff:
diff --git a/rust-runtime/aws-smithy-async/src/test_util.rs b/rust-runtime/aws-smithy-async/src/test_util.rs
index dd7eacfd89568c32a72b3aa2f800071263f8c56d..78b69d969fc99964efe0a652cc0b37b32765079f 100644
--- a/rust-runtime/aws-smithy-async/src/test_util.rs
+++ b/rust-runtime/aws-smithy-async/src/test_util.rs
@@ -189,6 +189,7 @@ impl InstantSleep {
 /// task.await.expect("successful completion");
 /// # };
 /// ```
+#[allow(dead_code)] // unused fields retained for their `Drop` impls
 pub struct CapturedSleep<'a>(oneshot::Sender<()>, &'a SleepGate, Duration);
 impl CapturedSleep<'_> {
     /// Allow the calling code to advance past the call to [`AsyncSleep::sleep`]
diff --git a/rust-runtime/aws-smithy-checksums/Cargo.toml b/rust-runtime/aws-smithy-checksums/Cargo.toml
index 46c912efd419d5299a89fda11f7ccbb289c47b61..985877fdf2275c4447865788bb9d9e42a4665d9e 100644
--- a/rust-runtime/aws-smithy-checksums/Cargo.toml
+++ b/rust-runtime/aws-smithy-checksums/Cargo.toml
@@ -16,7 +16,7 @@ repository = "https://github.com/smithy-lang/smithy-rs"
 aws-smithy-http = { path = "../aws-smithy-http" }
 aws-smithy-types = { path = "../aws-smithy-types" }
 bytes = "1"
-crc32c = "0.6.2"
+crc32c = "0.6.5"
 crc32fast = "1.3"
 hex = "0.4.3"
 http = "0.2.8"
diff --git a/rust-runtime/aws-smithy-http-server/src/macros.rs b/rust-runtime/aws-smithy-http-server/src/macros.rs
index 7f70ba55626222c2035ccd08b6ef1468f69c21a4..0bb2f4e352067658580b9fcb51fc9556238ce2fc 100644
--- a/rust-runtime/aws-smithy-http-server/src/macros.rs
+++ b/rust-runtime/aws-smithy-http-server/src/macros.rs
@@ -83,8 +83,6 @@ macro_rules! opaque_future {
     };
 }
 
-pub use opaque_future;
-
 macro_rules! convert_to_request_rejection {
     ($from:ty, $to:ident) => {
         impl From<$from> for RequestRejection {
diff --git a/rust-runtime/aws-smithy-runtime-api/src/shared.rs b/rust-runtime/aws-smithy-runtime-api/src/shared.rs
index cd15a135062d77f3d458a5a0088ec98325190a41..19405451ce03fb38af183515d5e1fdf4f6952b9d 100644
--- a/rust-runtime/aws-smithy-runtime-api/src/shared.rs
+++ b/rust-runtime/aws-smithy-runtime-api/src/shared.rs
@@ -202,7 +202,7 @@ mod tests {
     impl Thing for Thingamajig {}
 
     #[derive(Debug)]
-    struct SharedThing(Arc<dyn Thing>);
+    struct SharedThing(#[allow(dead_code)] Arc<dyn Thing>);
     impl Thing for SharedThing {}
     impl SharedThing {
         fn new(thing: impl Thing + 'static) -> Self {
diff --git a/rust-runtime/aws-smithy-runtime/src/test_util/capture_test_logs.rs b/rust-runtime/aws-smithy-runtime/src/test_util/capture_test_logs.rs
index 86d31d43bbc972c643206e3baff35b916b2a885b..92b450c1151d55ef1cd6af3d8bedaa988ceac656 100644
--- a/rust-runtime/aws-smithy-runtime/src/test_util/capture_test_logs.rs
+++ b/rust-runtime/aws-smithy-runtime/src/test_util/capture_test_logs.rs
@@ -12,7 +12,7 @@ use tracing_subscriber::fmt::TestWriter;
 
 /// A guard that resets log capturing upon being dropped.
 #[derive(Debug)]
-pub struct LogCaptureGuard(DefaultGuard);
+pub struct LogCaptureGuard(#[allow(dead_code)] DefaultGuard);
 
 /// Capture logs from this test.
 ///
diff --git a/rust-runtime/aws-smithy-types/src/type_erasure.rs b/rust-runtime/aws-smithy-types/src/type_erasure.rs
index 86533cb9f3f0896bc44e4b6624e6bfdce9484122..f209008a5cf0291d78198e01435b7ee3a8a9633f 100644
--- a/rust-runtime/aws-smithy-types/src/type_erasure.rs
+++ b/rust-runtime/aws-smithy-types/src/type_erasure.rs
@@ -233,9 +233,9 @@ mod tests {
     use std::fmt;
 
     #[derive(Debug)]
-    struct Foo(&'static str);
+    struct Foo(#[allow(dead_code)] &'static str);
     #[derive(Debug)]
-    struct Bar(isize);
+    struct Bar(#[allow(dead_code)] isize);
 
     #[derive(Debug, Clone, PartialEq, Eq)]
     struct TestErr {
diff --git a/tools/ci-build/Dockerfile b/tools/ci-build/Dockerfile
index 0fe17e5c76306a6f2a6eb42d865f67160bdf4492..d6262863c7a79628682c9ccc36393eddcae84869 100644
--- a/tools/ci-build/Dockerfile
+++ b/tools/ci-build/Dockerfile
@@ -7,7 +7,7 @@
 
 ARG base_image=public.ecr.aws/amazonlinux/amazonlinux:2023
 ARG rust_stable_version=1.74.1
-ARG rust_nightly_version=nightly-2023-10-10
+ARG rust_nightly_version=nightly-2024-02-07
 
 FROM ${base_image} AS bare_base_image
 RUN yum -y updateinfo
@@ -96,7 +96,7 @@ ARG cargo_deny_version=0.13.5
 RUN cargo install cargo-deny --locked --version ${cargo_deny_version}
 
 FROM install_rust AS cargo_udeps
-ARG cargo_udeps_version=0.1.42
+ARG cargo_udeps_version=0.1.46
 ARG rust_nightly_version
 RUN cargo +${rust_nightly_version} install cargo-udeps --locked --version ${cargo_udeps_version}
 
@@ -109,7 +109,7 @@ ARG cargo_minimal_versions_version=0.1.19
 RUN cargo install cargo-minimal-versions --locked --version ${cargo_minimal_versions_version}
 
 FROM install_rust AS cargo_check_external_types
-ARG cargo_check_external_types_version=0.1.8
+ARG cargo_check_external_types_version=0.1.11
 RUN cargo install cargo-check-external-types --locked --version ${cargo_check_external_types_version}
 
 FROM install_rust AS maturin