diff --git a/bridges/relays/ethereum/Cargo.toml b/bridges/relays/ethereum/Cargo.toml
index 816b1af14a..69e9e010d8 100644
--- a/bridges/relays/ethereum/Cargo.toml
+++ b/bridges/relays/ethereum/Cargo.toml
@@ -15,7 +15,7 @@ env_logger = "0.8.2"
 ethabi = "12.0"
 ethabi-contract = "11.0"
 ethabi-derive = "12.0"
-futures = "0.3.7"
+futures = "0.3.8"
 hex = "0.4"
 hex-literal = "0.3"
 log = "0.4.11"
diff --git a/bridges/relays/headers-relay/src/sync_loop.rs b/bridges/relays/headers-relay/src/sync_loop.rs
index 4a09e3518d..15f982af76 100644
--- a/bridges/relays/headers-relay/src/sync_loop.rs
+++ b/bridges/relays/headers-relay/src/sync_loop.rs
@@ -126,6 +126,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 	metrics_params: Option<MetricsParams>,
 	exit_signal: impl Future<Output = ()>,
 ) {
+	#![allow(unused_variables)] // this is to suppress weird errors from clippy
 	let mut local_pool = futures::executor::LocalPool::new();
 	let mut progress_context = (Instant::now(), None, None);
 
@@ -203,7 +204,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 						&mut source_retry_backoff,
 						|source_best_block_number| sync.source_best_header_number_response(source_best_block_number),
 						&mut source_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error retrieving best header number from {}", P::SOURCE_NAME),
 					).is_ok();
 				},
@@ -213,7 +214,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 						&mut source_retry_backoff,
 						|source_new_header| sync.headers_mut().header_response(source_new_header),
 						&mut source_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error retrieving header from {} node", P::SOURCE_NAME),
 					).is_ok();
 				},
@@ -223,7 +224,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 						&mut source_retry_backoff,
 						|source_orphan_header| sync.headers_mut().header_response(source_orphan_header),
 						&mut source_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error retrieving orphan header from {} node", P::SOURCE_NAME),
 					).is_ok();
 				},
@@ -233,7 +234,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 						&mut source_retry_backoff,
 						|(header, extra)| sync.headers_mut().extra_response(&header, extra),
 						&mut source_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error retrieving extra data from {} node", P::SOURCE_NAME),
 					).is_ok();
 				},
@@ -243,7 +244,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 						&mut source_retry_backoff,
 						|(header, completion)| sync.headers_mut().completion_response(&header, completion),
 						&mut source_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error retrieving completion data from {} node", P::SOURCE_NAME),
 					).is_ok();
 				},
@@ -294,7 +295,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 							}
 						},
 						&mut target_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error retrieving best known {} header from {} node", P::SOURCE_NAME, P::TARGET_NAME),
 					).is_ok();
 				},
@@ -306,7 +307,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 						&mut target_retry_backoff,
 						|incomplete_headers_ids| sync.headers_mut().incomplete_headers_response(incomplete_headers_ids),
 						&mut target_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error retrieving incomplete headers from {} node", P::TARGET_NAME),
 					).is_ok();
 				},
@@ -318,7 +319,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 							.headers_mut()
 							.maybe_orphan_response(&target_header, target_existence_status),
 						&mut target_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error retrieving existence status from {} node", P::TARGET_NAME),
 					).is_ok();
 				},
@@ -346,7 +347,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 						&mut target_retry_backoff,
 						|_| {},
 						&mut target_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error submitting headers to {} node", P::TARGET_NAME),
 					).is_ok();
 
@@ -367,7 +368,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 						&mut target_retry_backoff,
 						|completed_header| sync.headers_mut().header_completed(&completed_header),
 						&mut target_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error completing headers at {}", P::TARGET_NAME),
 					).is_ok();
 				},
@@ -379,7 +380,7 @@ pub fn run<P: HeadersSyncPipeline, TC: TargetClient<P>>(
 							.headers_mut()
 							.maybe_extra_response(&header, extra_check_result),
 						&mut target_go_offline_future,
-						|delay| async_std::task::sleep(delay),
+						async_std::task::sleep,
 						|| format!("Error retrieving receipts requirement from {} node", P::TARGET_NAME),
 					).is_ok();
 				},
diff --git a/bridges/relays/messages-relay/src/message_lane_loop.rs b/bridges/relays/messages-relay/src/message_lane_loop.rs
index 79f4a9493c..8278f8c3ec 100644
--- a/bridges/relays/messages-relay/src/message_lane_loop.rs
+++ b/bridges/relays/messages-relay/src/message_lane_loop.rs
@@ -374,7 +374,7 @@ async fn run_until_connection_lost<P: MessageLane, SC: SourceClient<P>, TC: Targ
 						}
 					},
 					&mut source_go_offline_future,
-					|delay| async_std::task::sleep(delay),
+					async_std::task::sleep,
 					|| format!("Error retrieving state from {} node", P::SOURCE_NAME),
 				).fail_if_connection_error(FailedClient::Source)?;
 			},
@@ -405,7 +405,7 @@ async fn run_until_connection_lost<P: MessageLane, SC: SourceClient<P>, TC: Targ
 						}
 					},
 					&mut target_go_offline_future,
-					|delay| async_std::task::sleep(delay),
+					async_std::task::sleep,
 					|| format!("Error retrieving state from {} node", P::TARGET_NAME),
 				).fail_if_connection_error(FailedClient::Target)?;
 			},
diff --git a/bridges/relays/messages-relay/src/message_race_loop.rs b/bridges/relays/messages-relay/src/message_race_loop.rs
index 5db54fbecf..3267ea9dc2 100644
--- a/bridges/relays/messages-relay/src/message_race_loop.rs
+++ b/bridges/relays/messages-relay/src/message_race_loop.rs
@@ -269,7 +269,7 @@ pub async fn run<P: MessageRace, SC: SourceClient<P>>(
 						strategy.source_nonces_updated(at_block, nonces);
 					},
 					&mut source_go_offline_future,
-					|delay| async_std::task::sleep(delay),
+					async_std::task::sleep,
 					|| format!("Error retrieving nonces from {}", P::source_name()),
 				).fail_if_connection_error(FailedClient::Source)?;
 			},
@@ -290,7 +290,7 @@ pub async fn run<P: MessageRace, SC: SourceClient<P>>(
 						strategy.target_nonces_updated(nonces, &mut race_state);
 					},
 					&mut target_go_offline_future,
-					|delay| async_std::task::sleep(delay),
+					async_std::task::sleep,
 					|| format!("Error retrieving nonces from {}", P::target_name()),
 				).fail_if_connection_error(FailedClient::Target)?;
 			},
@@ -311,7 +311,7 @@ pub async fn run<P: MessageRace, SC: SourceClient<P>>(
 						race_state.nonces_to_submit = Some((at_block, nonces_range, proof));
 					},
 					&mut source_go_offline_future,
-					|delay| async_std::task::sleep(delay),
+					async_std::task::sleep,
 					|| format!("Error generating proof at {}", P::source_name()),
 				).fail_if_connection_error(FailedClient::Source)?;
 			},
@@ -331,7 +331,7 @@ pub async fn run<P: MessageRace, SC: SourceClient<P>>(
 						race_state.nonces_submitted = Some(nonces_range);
 					},
 					&mut target_go_offline_future,
-					|delay| async_std::task::sleep(delay),
+					async_std::task::sleep,
 					|| format!("Error submitting proof {}", P::target_name()),
 				).fail_if_connection_error(FailedClient::Target)?;
 			}
diff --git a/bridges/relays/substrate/Cargo.toml b/bridges/relays/substrate/Cargo.toml
index 66a6aaea50..6cb9847ea2 100644
--- a/bridges/relays/substrate/Cargo.toml
+++ b/bridges/relays/substrate/Cargo.toml
@@ -9,7 +9,7 @@ license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
 async-std = "1.7.0"
 async-trait = "0.1.42"
 codec = { package = "parity-scale-codec", version = "1.3.4" }
-futures = "0.3.7"
+futures = "0.3.8"
 hex = "0.4"
 log = "0.4.11"
 num-traits = "0.2"