diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7077cb7c55b..e33cfc2558d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -243,7 +243,7 @@ jobs:
           sudo apt-get -y install build-essential binutils-dev libunwind-dev
       - name: Pin the regex dependency
         run: |
-          cd fuzz && cargo update -p regex --precise "1.9.6" --verbose && cd ..
+          cd fuzz && cargo update -p regex --precise "1.9.6" && cargo update -p libc --precise 0.2.183 && cd ..
       - name: Sanity check fuzz targets on Rust ${{ env.TOOLCHAIN }}
         run: |
           cd fuzz
diff --git a/ci/ci-tests.sh b/ci/ci-tests.sh
index 56fc45d753c..6d0abe0f03e 100755
--- a/ci/ci-tests.sh
+++ b/ci/ci-tests.sh
@@ -29,6 +29,16 @@ function PIN_RELEASE_DEPS {
 	# Starting with version 1.0.21, the `ryu` crate has an MSRV of rustc 1.68
 	[ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p ryu --precise "1.0.20" --verbose
 
+	# Starting with version 1.0.23, the `unicode-ident` crate has an MSRV of rustc 1.71
+	[ "$RUSTC_MINOR_VERSION" -lt 71 ] && cargo update -p unicode-ident --precise 1.0.22
+
+	# Starting with version 0.2.184, the `libc` crate has an MSRV of rustc 1.65
+	[ "$RUSTC_MINOR_VERSION" -lt 65 ] && cargo update -p libc --precise 0.2.183 --verbose
+
+	# Starting with version 0.4.0, the `getrandom` crate has an MSRV of rustc 1.85
+	GETRANDOM_VERSION="$(cargo tree 2>&1 | grep -o 'getrandom v0.4.*' | tr -d ' `' | tr 'v' '@' || echo -n)"
+	[ "$RUSTC_MINOR_VERSION" -lt 85 ] && cargo update -p "$GETRANDOM_VERSION" --precise 0.3.4 --verbose
+
 	return 0 # Don't fail the script if our rustc is higher than the last check
 }
 
@@ -75,6 +85,8 @@ pushd lightning-tests
 [ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p quote --precise "1.0.41" --verbose
 [ "$RUSTC_MINOR_VERSION" -lt 65 ] && cargo update -p regex --precise "1.9.6" --verbose
 [ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p proc-macro2 --precise "1.0.103" --verbose
+[ "$RUSTC_MINOR_VERSION" -lt 71 ] && cargo update -p unicode-ident --precise 1.0.22
+[ "$RUSTC_MINOR_VERSION" -lt 65 ] && cargo update -p libc --precise 0.2.183 --verbose
 cargo test
 [ "$CI_MINIMIZE_DISK_USAGE" != "" ] && cargo clean
 popd
diff --git a/ci/ci-tx-sync-tests.sh b/ci/ci-tx-sync-tests.sh
index 116e2c03880..77962d4ebf6 100755
--- a/ci/ci-tx-sync-tests.sh
+++ b/ci/ci-tx-sync-tests.sh
@@ -23,6 +23,9 @@ PIN_RELEASE_DEPS # pin the release dependencies
 # Starting with version 2.12.1, the `indexmap` crate has an MSRV of rustc 1.82.
 [ "$RUSTC_MINOR_VERSION" -lt 82 ] && cargo update -p indexmap --precise "2.11.4" --verbose
 
+# Starting with version 1.9.0, the `zeroize` crate has an MSRV of rustc 1.85.
+[ "$RUSTC_MINOR_VERSION" -lt 85 ] && cargo update -p zeroize --precise "1.8.2" --verbose
+
 export RUST_BACKTRACE=1
 
 echo -e "\n\nChecking Transaction Sync Clients with features."
diff --git a/lightning/src/chain/chainmonitor.rs b/lightning/src/chain/chainmonitor.rs
index 5136b07c0f3..c07e2c27d4f 100644
--- a/lightning/src/chain/chainmonitor.rs
+++ b/lightning/src/chain/chainmonitor.rs
@@ -337,7 +337,7 @@ where C::Target: chain::Filter,
 		};
 
 		let has_pending_claims = monitor_state.monitor.has_pending_claims();
-		if has_pending_claims || get_partition_key(funding_outpoint).is_some_and(|key| key % partition_factor == 0) {
+		if has_pending_claims || get_partition_key(funding_outpoint).map(|key| key % partition_factor == 0).unwrap_or(false) {
 			log_trace!(logger, "Syncing Channel Monitor for channel {}", log_funding_info!(monitor));
 			// Even though we don't track monitor updates from chain-sync as pending, we still want
 			// updates per-channel to be well-ordered so that users don't see a
diff --git a/lightning/src/ln/offers_tests.rs b/lightning/src/ln/offers_tests.rs
index 58ebd67316b..7697036f424 100644
--- a/lightning/src/ln/offers_tests.rs
+++ b/lightning/src/ln/offers_tests.rs
@@ -51,7 +51,7 @@ use crate::events::{ClosureReason, Event, MessageSendEventsProvider, PaymentFail
 use crate::ln::channelmanager::{Bolt12PaymentError, MAX_SHORT_LIVED_RELATIVE_EXPIRY, PaymentId, RecentPaymentDetails, Retry, self};
 use crate::types::features::Bolt12InvoiceFeatures;
 use crate::ln::functional_test_utils::*;
-use crate::ln::msgs::{ChannelMessageHandler, Init, NodeAnnouncement, OnionMessage, OnionMessageHandler, RoutingMessageHandler, SocketAddress, UnsignedGossipMessage, UnsignedNodeAnnouncement};
+use crate::ln::msgs::{ChannelMessageHandler, Init, OnionMessage, OnionMessageHandler};
 use crate::ln::outbound_payment::IDEMPOTENCY_TIMEOUT_TICKS;
 use crate::offers::invoice::Bolt12Invoice;
 use crate::offers::invoice_error::InvoiceError;
@@ -61,8 +61,7 @@ use crate::offers::parse::Bolt12SemanticError;
 use crate::onion_message::messenger::{Destination, PeeledOnion, MessageSendInstructions};
 use crate::onion_message::offers::OffersMessage;
 use crate::onion_message::packet::ParsedOnionMessageContents;
-use crate::routing::gossip::{NodeAlias, NodeId};
-use crate::sign::{NodeSigner, Recipient};
+use crate::sign::NodeSigner;
 use crate::util::ser::Writeable;
 
 use crate::prelude::*;
diff --git a/lightning/src/ln/peer_handler.rs b/lightning/src/ln/peer_handler.rs
index c05f8fb38c6..8e5a415cab2 100644
--- a/lightning/src/ln/peer_handler.rs
+++ b/lightning/src/ln/peer_handler.rs
@@ -37,7 +37,6 @@ use crate::onion_message::packet::OnionMessageContents;
 use crate::routing::gossip::{NodeId, NodeAlias};
 use crate::util::atomic_counter::AtomicCounter;
 use crate::util::logger::{Level, Logger, WithContext};
-use crate::util::string::PrintableString;
 
 #[allow(unused_imports)]
 use crate::prelude::*;