diff --git a/lightning/src/chain/channelmonitor.rs b/lightning/src/chain/channelmonitor.rs
index 37c3383a3ad..2b47a02e4e0 100644
--- a/lightning/src/chain/channelmonitor.rs
+++ b/lightning/src/chain/channelmonitor.rs
@@ -2229,7 +2229,7 @@ macro_rules! fail_unbroadcast_htlcs {
 							// broadcastable commitment transaction has the HTLC in it, but it
 							// cannot currently change after channel initialization, so we don't
 							// need to here.
-							let confirmed_htlcs_iter: &mut Iterator<Item = (&HTLCOutputInCommitment, Option<&HTLCSource>)> = &mut $confirmed_htlcs_list;
+							let confirmed_htlcs_iter: &mut dyn Iterator<Item = (&HTLCOutputInCommitment, Option<&HTLCSource>)> = &mut $confirmed_htlcs_list;
 
 							let mut matched_htlc = false;
 							for (ref broadcast_htlc, ref broadcast_source) in confirmed_htlcs_iter {
diff --git a/lightning/src/chain/mod.rs b/lightning/src/chain/mod.rs
index 89e0b155cf6..44a3b5fdff1 100644
--- a/lightning/src/chain/mod.rs
+++ b/lightning/src/chain/mod.rs
@@ -357,7 +357,7 @@ pub struct WatchedOutput {
 	pub script_pubkey: Script,
 }
 
-impl<T: Listen> Listen for core::ops::Deref<Target = T> {
+impl<T: Listen> Listen for dyn core::ops::Deref<Target = T> {
 	fn filtered_block_connected(&self, header: &BlockHeader, txdata: &TransactionData, height: u32) {
 		(**self).filtered_block_connected(header, txdata, height);
 	}
diff --git a/lightning/src/ln/channel.rs b/lightning/src/ln/channel.rs
index 33de30a4b84..a064f9b9ed5 100644
--- a/lightning/src/ln/channel.rs
+++ b/lightning/src/ln/channel.rs
@@ -5014,7 +5014,7 @@ impl<SP: Deref> Channel<SP> where
 			// larger. If we don't know that time has moved forward, we can just set it to the last
 			// time we saw and it will be ignored.
 			let best_time = self.context.update_time_counter;
-			match self.do_best_block_updated(reorg_height, best_time, None::<(ChainHash, &&NodeSigner, &UserConfig)>, logger) {
+			match self.do_best_block_updated(reorg_height, best_time, None::<(ChainHash, &&dyn NodeSigner, &UserConfig)>, logger) {
 				Ok((channel_ready, timed_out_htlcs, announcement_sigs)) => {
 					assert!(channel_ready.is_none(), "We can't generate a funding with 0 confirmations?");
 					assert!(timed_out_htlcs.is_empty(), "We can't have accepted HTLCs with a timeout before our funding confirmation?");
diff --git a/lightning/src/util/logger.rs b/lightning/src/util/logger.rs
index dbca9b785e8..6ec17a9f3f8 100644
--- a/lightning/src/util/logger.rs
+++ b/lightning/src/util/logger.rs
@@ -203,11 +203,11 @@ mod tests {
 	}
 
 	struct WrapperLog {
-		logger: Arc<Logger>
+		logger: Arc<dyn Logger>
 	}
 
 	impl WrapperLog {
-		fn new(logger: Arc<Logger>) -> WrapperLog {
+		fn new(logger: Arc<dyn Logger>) -> WrapperLog {
 			WrapperLog {
 				logger,
 			}
@@ -227,7 +227,7 @@ mod tests {
 	fn test_logging_macros() {
 		let mut logger = TestLogger::new();
 		logger.enable(Level::Gossip);
-		let logger : Arc<Logger> = Arc::new(logger);
+		let logger : Arc<dyn Logger> = Arc::new(logger);
 		let wrapper = WrapperLog::new(Arc::clone(&logger));
 		wrapper.call_macros();
 	}
diff --git a/lightning/src/util/test_utils.rs b/lightning/src/util/test_utils.rs
index d42a84d361d..4b47907afbf 100644
--- a/lightning/src/util/test_utils.rs
+++ b/lightning/src/util/test_utils.rs
@@ -206,7 +206,7 @@ pub struct TestChainMonitor<'a> {
 	pub added_monitors: Mutex<Vec<(OutPoint, channelmonitor::ChannelMonitor<TestChannelSigner>)>>,
 	pub monitor_updates: Mutex<HashMap<ChannelId, Vec<channelmonitor::ChannelMonitorUpdate>>>,
 	pub latest_monitor_update_id: Mutex<HashMap<ChannelId, (OutPoint, u64, MonitorUpdateId)>>,
-	pub chain_monitor: chainmonitor::ChainMonitor<TestChannelSigner, &'a TestChainSource, &'a chaininterface::BroadcasterInterface, &'a TestFeeEstimator, &'a TestLogger, &'a chainmonitor::Persist<TestChannelSigner>>,
+	pub chain_monitor: chainmonitor::ChainMonitor<TestChannelSigner, &'a TestChainSource, &'a dyn chaininterface::BroadcasterInterface, &'a TestFeeEstimator, &'a TestLogger, &'a dyn chainmonitor::Persist<TestChannelSigner>>,
 	pub keys_manager: &'a TestKeysInterface,
 	/// If this is set to Some(), the next update_channel call (not watch_channel) must be a
 	/// ChannelForceClosed event for the given channel_id with should_broadcast set to the given
@@ -217,7 +217,7 @@ pub struct TestChainMonitor<'a> {
 	pub expect_monitor_round_trip_fail: Mutex<Option<ChannelId>>,
 }
 impl<'a> TestChainMonitor<'a> {
-	pub fn new(chain_source: Option<&'a TestChainSource>, broadcaster: &'a chaininterface::BroadcasterInterface, logger: &'a TestLogger, fee_estimator: &'a TestFeeEstimator, persister: &'a chainmonitor::Persist<TestChannelSigner>, keys_manager: &'a TestKeysInterface) -> Self {
+	pub fn new(chain_source: Option<&'a TestChainSource>, broadcaster: &'a dyn chaininterface::BroadcasterInterface, logger: &'a TestLogger, fee_estimator: &'a TestFeeEstimator, persister: &'a dyn chainmonitor::Persist<TestChannelSigner>, keys_manager: &'a TestKeysInterface) -> Self {
 		Self {
 			added_monitors: Mutex::new(Vec::new()),
 			monitor_updates: Mutex::new(HashMap::new()),