diff --git a/beacon_node/beacon_chain/src/lib.rs b/beacon_node/beacon_chain/src/lib.rs
index 0f94c651aaf..173ce13b4a1 100644
--- a/beacon_node/beacon_chain/src/lib.rs
+++ b/beacon_node/beacon_chain/src/lib.rs
@@ -1,4 +1,3 @@
-#![recursion_limit = "128"] // For lazy-static
 pub mod attestation_rewards;
 pub mod attestation_verification;
 mod attester_cache;
diff --git a/beacon_node/http_api/src/lib.rs b/beacon_node/http_api/src/lib.rs
index 6cca673b85e..05fe2fe1040 100644
--- a/beacon_node/http_api/src/lib.rs
+++ b/beacon_node/http_api/src/lib.rs
@@ -1,4 +1,3 @@
-#![recursion_limit = "256"]
 //! This crate contains a HTTP server which serves the endpoints listed here:
 //!
 //! https://github.com/ethereum/beacon-APIs
@@ -71,7 +70,8 @@ use warp::Reply;
 use warp::{http::Response, Filter};
 use warp_utils::{
     query::multi_key_query,
-    task::{blocking_json_task, blocking_task},
+    task::{blocking_json_task, blocking_response_task},
+    uor::UnifyingOrFilter,
 };
 
 const API_PREFIX: &str = "eth";
@@ -1125,7 +1125,7 @@ pub fn serve<T: BeaconChainTypes>(
              log: Logger| async move {
                 publish_blocks::publish_block(None, block, chain, &network_tx, log)
                     .await
-                    .map(|()| warp::reply())
+                    .map(|()| warp::reply().into_response())
             },
         );
 
@@ -1149,7 +1149,7 @@ pub fn serve<T: BeaconChainTypes>(
              log: Logger| async move {
                 publish_blocks::publish_blinded_block(block, chain, &network_tx, log)
                     .await
-                    .map(|()| warp::reply())
+                    .map(|()| warp::reply().into_response())
             },
         );
 
@@ -1255,7 +1255,7 @@ pub fn serve<T: BeaconChainTypes>(
             |block_id: BlockId,
              chain: Arc<BeaconChain<T>>,
              accept_header: Option<api_types::Accept>| {
-                blocking_task(move || {
+                blocking_response_task(move || {
                     let (block, execution_optimistic) = block_id.blinded_block(&chain)?;
                     let fork_name = block
                         .fork_name(&chain.spec)
@@ -1767,7 +1767,7 @@ pub fn serve<T: BeaconChainTypes>(
         .and(eth1_service_filter.clone())
         .and_then(
             |accept_header: Option<api_types::Accept>, eth1_service: eth1::Service| {
-                blocking_task(move || match accept_header {
+                blocking_response_task(move || match accept_header {
                     Some(api_types::Accept::Json) | None => {
                         let snapshot = eth1_service.get_deposit_snapshot();
                         Ok(
@@ -1986,7 +1986,7 @@ pub fn serve<T: BeaconChainTypes>(
              state_id: StateId,
              accept_header: Option<api_types::Accept>,
              chain: Arc<BeaconChain<T>>| {
-                blocking_task(move || match accept_header {
+                blocking_response_task(move || match accept_header {
                     Some(api_types::Accept::Ssz) => {
                         // We can ignore the optimistic status for the "fork" since it's a
                         // specification constant that doesn't change across competing heads of the
@@ -1999,7 +1999,9 @@ pub fn serve<T: BeaconChainTypes>(
                             .status(200)
                             .header("Content-Type", "application/octet-stream")
                             .body(state.as_ssz_bytes().into())
-                            .map(|resp| add_consensus_version_header(resp, fork_name))
+                            .map(|resp: warp::reply::Response| {
+                                add_consensus_version_header(resp, fork_name)
+                            })
                             .map_err(|e| {
                                 warp_utils::reject::custom_server_error(format!(
                                     "failed to create response: {}",
@@ -2162,7 +2164,7 @@ pub fn serve<T: BeaconChainTypes>(
         .and(warp::path::end())
         .and(network_globals.clone())
         .and_then(|network_globals: Arc<NetworkGlobals<T::EthSpec>>| {
-            blocking_task(move || match *network_globals.sync_state.read() {
+            blocking_response_task(move || match *network_globals.sync_state.read() {
                 SyncState::SyncingFinalized { .. }
                 | SyncState::SyncingHead { .. }
                 | SyncState::SyncTransition
@@ -2426,7 +2428,7 @@ pub fn serve<T: BeaconChainTypes>(
                     .map_err(inconsistent_fork_rejection)?;
 
                 fork_versioned_response(endpoint_version, fork_name, block)
-                    .map(|response| warp::reply::json(&response))
+                    .map(|response| warp::reply::json(&response).into_response())
             },
         );
 
@@ -2483,7 +2485,7 @@ pub fn serve<T: BeaconChainTypes>(
 
                 // Pose as a V2 endpoint so we return the fork `version`.
                 fork_versioned_response(V2, fork_name, block)
-                    .map(|response| warp::reply::json(&response))
+                    .map(|response| warp::reply::json(&response).into_response())
             },
         );
 
@@ -2856,7 +2858,7 @@ pub fn serve<T: BeaconChainTypes>(
                         ))
                     })?;
 
-                Ok::<_, warp::reject::Rejection>(warp::reply::json(&()))
+                Ok::<_, warp::reject::Rejection>(warp::reply::json(&()).into_response())
             },
         );
 
@@ -2965,7 +2967,7 @@ pub fn serve<T: BeaconChainTypes>(
                 builder
                     .post_builder_validators(&filtered_registration_data)
                     .await
-                    .map(|resp| warp::reply::json(&resp))
+                    .map(|resp| warp::reply::json(&resp).into_response())
                     .map_err(|e| {
                         warn!(
                             log,
@@ -3227,7 +3229,7 @@ pub fn serve<T: BeaconChainTypes>(
         .and(warp::path::end())
         .and(chain_filter.clone())
         .and_then(|chain: Arc<BeaconChain<T>>| {
-            blocking_task(move || {
+            blocking_response_task(move || {
                 Ok::<_, warp::Rejection>(warp::reply::json(&api_types::GenericResponseRef::from(
                     chain
                         .canonical_head
@@ -3346,7 +3348,7 @@ pub fn serve<T: BeaconChainTypes>(
         .and(warp::path::end())
         .and(chain_filter.clone())
         .and_then(|state_id: StateId, chain: Arc<BeaconChain<T>>| {
-            blocking_task(move || {
+            blocking_response_task(move || {
                 // This debug endpoint provides no indication of optimistic status.
                 let (state, _execution_optimistic) = state_id.state(&chain)?;
                 Response::builder()
@@ -3482,9 +3484,10 @@ pub fn serve<T: BeaconChainTypes>(
         .and(chain_filter.clone())
         .and_then(|chain: Arc<BeaconChain<T>>| async move {
             let merge_readiness = chain.check_merge_readiness().await;
-            Ok::<_, warp::reject::Rejection>(warp::reply::json(&api_types::GenericResponse::from(
-                merge_readiness,
-            )))
+            Ok::<_, warp::reject::Rejection>(
+                warp::reply::json(&api_types::GenericResponse::from(merge_readiness))
+                    .into_response(),
+            )
         });
 
     let get_events = eth_v1
@@ -3495,7 +3498,7 @@ pub fn serve<T: BeaconChainTypes>(
         .and_then(
             |topics_res: Result<api_types::EventQuery, warp::Rejection>,
              chain: Arc<BeaconChain<T>>| {
-                blocking_task(move || {
+                blocking_response_task(move || {
                     let topics = topics_res?;
                     // for each topic subscribed spawn a new subscription
                     let mut receivers = Vec::with_capacity(topics.topics.len());
@@ -3562,108 +3565,110 @@ pub fn serve<T: BeaconChainTypes>(
         );
 
     // Define the ultimate set of routes that will be provided to the server.
+    // Use `uor` rather than `or` in order to simplify types (see `UnifyingOrFilter`).
     let routes = warp::get()
         .and(
             get_beacon_genesis
-                .boxed()
-                .or(get_beacon_state_root.boxed())
-                .or(get_beacon_state_fork.boxed())
-                .or(get_beacon_state_finality_checkpoints.boxed())
-                .or(get_beacon_state_validator_balances.boxed())
-                .or(get_beacon_state_validators_id.boxed())
-                .or(get_beacon_state_validators.boxed())
-                .or(get_beacon_state_committees.boxed())
-                .or(get_beacon_state_sync_committees.boxed())
-                .or(get_beacon_state_randao.boxed())
-                .or(get_beacon_headers.boxed())
-                .or(get_beacon_headers_block_id.boxed())
-                .or(get_beacon_block.boxed())
-                .or(get_beacon_block_attestations.boxed())
-                .or(get_beacon_blinded_block.boxed())
-                .or(get_beacon_block_root.boxed())
-                .or(get_beacon_pool_attestations.boxed())
-                .or(get_beacon_pool_attester_slashings.boxed())
-                .or(get_beacon_pool_proposer_slashings.boxed())
-                .or(get_beacon_pool_voluntary_exits.boxed())
-                .or(get_beacon_pool_bls_to_execution_changes.boxed())
-                .or(get_beacon_deposit_snapshot.boxed())
-                .or(get_beacon_rewards_blocks.boxed())
-                .or(get_config_fork_schedule.boxed())
-                .or(get_config_spec.boxed())
-                .or(get_config_deposit_contract.boxed())
-                .or(get_debug_beacon_states.boxed())
-                .or(get_debug_beacon_heads.boxed())
-                .or(get_node_identity.boxed())
-                .or(get_node_version.boxed())
-                .or(get_node_syncing.boxed())
-                .or(get_node_health.boxed())
-                .or(get_node_peers_by_id.boxed())
-                .or(get_node_peers.boxed())
-                .or(get_node_peer_count.boxed())
-                .or(get_validator_duties_proposer.boxed())
-                .or(get_validator_blocks.boxed())
-                .or(get_validator_blinded_blocks.boxed())
-                .or(get_validator_attestation_data.boxed())
-                .or(get_validator_aggregate_attestation.boxed())
-                .or(get_validator_sync_committee_contribution.boxed())
-                .or(get_lighthouse_health.boxed())
-                .or(get_lighthouse_ui_health.boxed())
-                .or(get_lighthouse_ui_validator_count.boxed())
-                .or(get_lighthouse_syncing.boxed())
-                .or(get_lighthouse_nat.boxed())
-                .or(get_lighthouse_peers.boxed())
-                .or(get_lighthouse_peers_connected.boxed())
-                .or(get_lighthouse_proto_array.boxed())
-                .or(get_lighthouse_validator_inclusion_global.boxed())
-                .or(get_lighthouse_validator_inclusion.boxed())
-                .or(get_lighthouse_eth1_syncing.boxed())
-                .or(get_lighthouse_eth1_block_cache.boxed())
-                .or(get_lighthouse_eth1_deposit_cache.boxed())
-                .or(get_lighthouse_beacon_states_ssz.boxed())
-                .or(get_lighthouse_staking.boxed())
-                .or(get_lighthouse_database_info.boxed())
-                .or(get_lighthouse_block_rewards.boxed())
-                .or(get_lighthouse_attestation_performance.boxed())
-                .or(get_lighthouse_block_packing_efficiency.boxed())
-                .or(get_lighthouse_merge_readiness.boxed())
-                .or(get_events.boxed())
+                .uor(get_beacon_state_root)
+                .uor(get_beacon_state_fork)
+                .uor(get_beacon_state_finality_checkpoints)
+                .uor(get_beacon_state_validator_balances)
+                .uor(get_beacon_state_validators_id)
+                .uor(get_beacon_state_validators)
+                .uor(get_beacon_state_committees)
+                .uor(get_beacon_state_sync_committees)
+                .uor(get_beacon_state_randao)
+                .uor(get_beacon_headers)
+                .uor(get_beacon_headers_block_id)
+                .uor(get_beacon_block)
+                .uor(get_beacon_block_attestations)
+                .uor(get_beacon_blinded_block)
+                .uor(get_beacon_block_root)
+                .uor(get_beacon_pool_attestations)
+                .uor(get_beacon_pool_attester_slashings)
+                .uor(get_beacon_pool_proposer_slashings)
+                .uor(get_beacon_pool_voluntary_exits)
+                .uor(get_beacon_pool_bls_to_execution_changes)
+                .uor(get_beacon_deposit_snapshot)
+                .uor(get_beacon_rewards_blocks)
+                .uor(get_config_fork_schedule)
+                .uor(get_config_spec)
+                .uor(get_config_deposit_contract)
+                .uor(get_debug_beacon_states)
+                .uor(get_debug_beacon_heads)
+                .uor(get_node_identity)
+                .uor(get_node_version)
+                .uor(get_node_syncing)
+                .uor(get_node_health)
+                .uor(get_node_peers_by_id)
+                .uor(get_node_peers)
+                .uor(get_node_peer_count)
+                .uor(get_validator_duties_proposer)
+                .uor(get_validator_blocks)
+                .uor(get_validator_blinded_blocks)
+                .uor(get_validator_attestation_data)
+                .uor(get_validator_aggregate_attestation)
+                .uor(get_validator_sync_committee_contribution)
+                .uor(get_lighthouse_health)
+                .uor(get_lighthouse_ui_health)
+                .uor(get_lighthouse_ui_validator_count)
+                .uor(get_lighthouse_syncing)
+                .uor(get_lighthouse_nat)
+                .uor(get_lighthouse_peers)
+                .uor(get_lighthouse_peers_connected)
+                .uor(get_lighthouse_proto_array)
+                .uor(get_lighthouse_validator_inclusion_global)
+                .uor(get_lighthouse_validator_inclusion)
+                .uor(get_lighthouse_eth1_syncing)
+                .uor(get_lighthouse_eth1_block_cache)
+                .uor(get_lighthouse_eth1_deposit_cache)
+                .uor(get_lighthouse_beacon_states_ssz)
+                .uor(get_lighthouse_staking)
+                .uor(get_lighthouse_database_info)
+                .uor(get_lighthouse_block_rewards)
+                .uor(get_lighthouse_attestation_performance)
+                .uor(get_lighthouse_block_packing_efficiency)
+                .uor(get_lighthouse_merge_readiness)
+                .uor(get_events)
                 .recover(warp_utils::reject::handle_rejection),
         )
         .boxed()
-        .or(warp::post().and(
-            post_beacon_blocks
-                .boxed()
-                .or(post_beacon_blinded_blocks.boxed())
-                .or(post_beacon_pool_attestations.boxed())
-                .or(post_beacon_pool_attester_slashings.boxed())
-                .or(post_beacon_pool_proposer_slashings.boxed())
-                .or(post_beacon_pool_voluntary_exits.boxed())
-                .or(post_beacon_pool_sync_committees.boxed())
-                .or(post_beacon_pool_bls_to_execution_changes.boxed())
-                .or(post_beacon_rewards_attestations.boxed())
-                .or(post_beacon_rewards_sync_committee.boxed())
-                .or(post_validator_duties_attester.boxed())
-                .or(post_validator_duties_sync.boxed())
-                .or(post_validator_aggregate_and_proofs.boxed())
-                .or(post_validator_contribution_and_proofs.boxed())
-                .or(post_validator_beacon_committee_subscriptions.boxed())
-                .or(post_validator_sync_committee_subscriptions.boxed())
-                .or(post_validator_prepare_beacon_proposer.boxed())
-                .or(post_validator_register_validator.boxed())
-                .or(post_lighthouse_liveness.boxed())
-                .or(post_lighthouse_database_reconstruct.boxed())
-                .or(post_lighthouse_database_historical_blocks.boxed())
-                .or(post_lighthouse_block_rewards.boxed())
-                .or(post_lighthouse_ui_validator_metrics.boxed())
-                .or(post_lighthouse_ui_validator_info.boxed())
-                .recover(warp_utils::reject::handle_rejection),
-        ))
+        .uor(
+            warp::post().and(
+                post_beacon_blocks
+                    .uor(post_beacon_blinded_blocks)
+                    .uor(post_beacon_pool_attestations)
+                    .uor(post_beacon_pool_attester_slashings)
+                    .uor(post_beacon_pool_proposer_slashings)
+                    .uor(post_beacon_pool_voluntary_exits)
+                    .uor(post_beacon_pool_sync_committees)
+                    .uor(post_beacon_pool_bls_to_execution_changes)
+                    .uor(post_beacon_rewards_attestations)
+                    .uor(post_beacon_rewards_sync_committee)
+                    .uor(post_validator_duties_attester)
+                    .uor(post_validator_duties_sync)
+                    .uor(post_validator_aggregate_and_proofs)
+                    .uor(post_validator_contribution_and_proofs)
+                    .uor(post_validator_beacon_committee_subscriptions)
+                    .uor(post_validator_sync_committee_subscriptions)
+                    .uor(post_validator_prepare_beacon_proposer)
+                    .uor(post_validator_register_validator)
+                    .uor(post_lighthouse_liveness)
+                    .uor(post_lighthouse_database_reconstruct)
+                    .uor(post_lighthouse_database_historical_blocks)
+                    .uor(post_lighthouse_block_rewards)
+                    .uor(post_lighthouse_ui_validator_metrics)
+                    .uor(post_lighthouse_ui_validator_info)
+                    .recover(warp_utils::reject::handle_rejection),
+            ),
+        )
         .recover(warp_utils::reject::handle_rejection)
         .with(slog_logging(log.clone()))
         .with(prometheus_metrics())
         // Add a `Server` header.
         .map(|reply| warp::reply::with_header(reply, "Server", &version_with_platform()))
-        .with(cors_builder.build());
+        .with(cors_builder.build())
+        .boxed();
 
     let http_socket: SocketAddr = SocketAddr::new(config.listen_addr, config.listen_port);
     let http_server: HttpServer = match config.tls_config {
diff --git a/beacon_node/http_api/src/version.rs b/beacon_node/http_api/src/version.rs
index 30f475e689c..e7fd8910b18 100644
--- a/beacon_node/http_api/src/version.rs
+++ b/beacon_node/http_api/src/version.rs
@@ -4,7 +4,7 @@ use serde::Serialize;
 use types::{
     ExecutionOptimisticForkVersionedResponse, ForkName, ForkVersionedResponse, InconsistentFork,
 };
-use warp::reply::{self, Reply, WithHeader};
+use warp::reply::{self, Reply, Response};
 
 pub const V1: EndpointVersion = EndpointVersion(1);
 pub const V2: EndpointVersion = EndpointVersion(2);
@@ -48,8 +48,8 @@ pub fn execution_optimistic_fork_versioned_response<T: Serialize>(
 }
 
 /// Add the `Eth-Consensus-Version` header to a response.
-pub fn add_consensus_version_header<T: Reply>(reply: T, fork_name: ForkName) -> WithHeader<T> {
-    reply::with_header(reply, CONSENSUS_VERSION_HEADER, fork_name.to_string())
+pub fn add_consensus_version_header<T: Reply>(reply: T, fork_name: ForkName) -> Response {
+    reply::with_header(reply, CONSENSUS_VERSION_HEADER, fork_name.to_string()).into_response()
 }
 
 pub fn inconsistent_fork_rejection(error: InconsistentFork) -> warp::reject::Rejection {
diff --git a/beacon_node/http_api/tests/main.rs b/beacon_node/http_api/tests/main.rs
index ca6a27530a6..88e0032ecde 100644
--- a/beacon_node/http_api/tests/main.rs
+++ b/beacon_node/http_api/tests/main.rs
@@ -1,5 +1,4 @@
 #![cfg(not(debug_assertions))] // Tests are too slow in debug.
-#![recursion_limit = "256"]
 
 pub mod common;
 pub mod fork_tests;
diff --git a/beacon_node/tests/test.rs b/beacon_node/tests/test.rs
index 8ccb260d29b..bbec70330b7 100644
--- a/beacon_node/tests/test.rs
+++ b/beacon_node/tests/test.rs
@@ -1,5 +1,4 @@
 #![cfg(test)]
-#![recursion_limit = "512"]
 
 use beacon_chain::StateSkipConfig;
 use node_test_rig::{
diff --git a/common/compare_fields_derive/src/lib.rs b/common/compare_fields_derive/src/lib.rs
index 752c09ee056..a8b92b3d548 100644
--- a/common/compare_fields_derive/src/lib.rs
+++ b/common/compare_fields_derive/src/lib.rs
@@ -1,4 +1,3 @@
-#![recursion_limit = "256"]
 extern crate proc_macro;
 
 use proc_macro::TokenStream;
diff --git a/common/warp_utils/src/lib.rs b/common/warp_utils/src/lib.rs
index 346361b18fe..77d61251f24 100644
--- a/common/warp_utils/src/lib.rs
+++ b/common/warp_utils/src/lib.rs
@@ -6,3 +6,4 @@ pub mod metrics;
 pub mod query;
 pub mod reject;
 pub mod task;
+pub mod uor;
diff --git a/common/warp_utils/src/task.rs b/common/warp_utils/src/task.rs
index c3b3e86e2ed..001231f2c6b 100644
--- a/common/warp_utils/src/task.rs
+++ b/common/warp_utils/src/task.rs
@@ -1,4 +1,5 @@
 use serde::Serialize;
+use warp::reply::{Reply, Response};
 
 /// A convenience wrapper around `blocking_task`.
 pub async fn blocking_task<F, T>(func: F) -> Result<T, warp::Rejection>
@@ -8,16 +9,29 @@ where
 {
     tokio::task::spawn_blocking(func)
         .await
-        .unwrap_or_else(|_| Err(warp::reject::reject())) // This should really be a 500
+        .unwrap_or_else(|_| Err(warp::reject::reject()))
+}
+
+/// A convenience wrapper around `blocking_task` that returns a `warp::reply::Response`.
+///
+/// Using this method consistently makes it possible to simplify types using `.unify()` or `.uor()`.
+pub async fn blocking_response_task<F, T>(func: F) -> Result<Response, warp::Rejection>
+where
+    F: FnOnce() -> Result<T, warp::Rejection> + Send + 'static,
+    T: Reply + Send + 'static,
+{
+    blocking_task(func).await.map(Reply::into_response)
 }
 
 /// A convenience wrapper around `blocking_task` for use with `warp` JSON responses.
-pub async fn blocking_json_task<F, T>(func: F) -> Result<warp::reply::Json, warp::Rejection>
+pub async fn blocking_json_task<F, T>(func: F) -> Result<Response, warp::Rejection>
 where
     F: FnOnce() -> Result<T, warp::Rejection> + Send + 'static,
     T: Serialize + Send + 'static,
 {
-    blocking_task(func)
-        .await
-        .map(|resp| warp::reply::json(&resp))
+    blocking_response_task(|| {
+        let response = func()?;
+        Ok(warp::reply::json(&response))
+    })
+    .await
 }
diff --git a/common/warp_utils/src/uor.rs b/common/warp_utils/src/uor.rs
new file mode 100644
index 00000000000..363f1df7d4d
--- /dev/null
+++ b/common/warp_utils/src/uor.rs
@@ -0,0 +1,25 @@
+use warp::{filters::BoxedFilter, Filter, Rejection};
+
+/// Mixin trait for `Filter` providing the unifying-or method.
+pub trait UnifyingOrFilter: Filter<Error = Rejection> + Sized + Send + Sync + 'static
+where
+    Self::Extract: Send,
+{
+    /// Unifying `or`.
+    ///
+    /// This is a shorthand for `self.or(other).unify().boxed()`, which is useful because it keeps
+    /// the filter type simple and prevents type-checker explosions.
+    fn uor<F>(self, other: F) -> BoxedFilter<Self::Extract>
+    where
+        F: Filter<Extract = Self::Extract, Error = Rejection> + Clone + Send + Sync + 'static,
+    {
+        self.or(other).unify().boxed()
+    }
+}
+
+impl<F> UnifyingOrFilter for F
+where
+    F: Filter<Error = Rejection> + Sized + Send + Sync + 'static,
+    F::Extract: Send,
+{
+}
diff --git a/consensus/fork_choice/src/fork_choice.rs b/consensus/fork_choice/src/fork_choice.rs
index 566764195d4..916b1d5582b 100644
--- a/consensus/fork_choice/src/fork_choice.rs
+++ b/consensus/fork_choice/src/fork_choice.rs
@@ -1695,7 +1695,6 @@ mod tests {
 
     fn get_queued_attestations() -> Vec<QueuedAttestation> {
         (1..4)
-            .into_iter()
             .map(|i| QueuedAttestation {
                 slot: Slot::new(i),
                 attesting_indices: vec![],
diff --git a/consensus/ssz_derive/src/lib.rs b/consensus/ssz_derive/src/lib.rs
index 40d63fd02fa..53752ba44b6 100644
--- a/consensus/ssz_derive/src/lib.rs
+++ b/consensus/ssz_derive/src/lib.rs
@@ -1,4 +1,3 @@
-#![recursion_limit = "256"]
 //! Provides procedural derive macros for the `Encode` and `Decode` traits of the `eth2_ssz` crate.
 //!
 //! ## Attributes
diff --git a/consensus/tree_hash_derive/src/lib.rs b/consensus/tree_hash_derive/src/lib.rs
index 21ff324d542..85ece80fb56 100644
--- a/consensus/tree_hash_derive/src/lib.rs
+++ b/consensus/tree_hash_derive/src/lib.rs
@@ -1,4 +1,3 @@
-#![recursion_limit = "256"]
 use darling::FromDeriveInput;
 use proc_macro::TokenStream;
 use quote::quote;
diff --git a/consensus/types/src/lib.rs b/consensus/types/src/lib.rs
index 6a5aef36fe2..82407424411 100644
--- a/consensus/types/src/lib.rs
+++ b/consensus/types/src/lib.rs
@@ -1,6 +1,4 @@
 //! Ethereum 2.0 types
-// Required for big type-level numbers
-#![recursion_limit = "128"]
 // Clippy lint set up
 #![cfg_attr(
     not(test),
diff --git a/crypto/bls/src/generic_aggregate_signature.rs b/crypto/bls/src/generic_aggregate_signature.rs
index fdb59626fb2..a61529af250 100644
--- a/crypto/bls/src/generic_aggregate_signature.rs
+++ b/crypto/bls/src/generic_aggregate_signature.rs
@@ -266,7 +266,7 @@ where
 }
 
 /// Hashes the `self.serialize()` bytes.
-#[allow(clippy::derive_hash_xor_eq)]
+#[allow(clippy::derived_hash_with_manual_eq)]
 impl<Pub, AggPub, Sig, AggSig> Hash for GenericAggregateSignature<Pub, AggPub, Sig, AggSig>
 where
     Sig: TSignature<Pub>,
diff --git a/lighthouse/src/main.rs b/lighthouse/src/main.rs
index babe2f8dca7..b05e78fe5a7 100644
--- a/lighthouse/src/main.rs
+++ b/lighthouse/src/main.rs
@@ -1,5 +1,3 @@
-#![recursion_limit = "256"]
-
 mod metrics;
 
 use beacon_node::ProductionBeaconNode;
diff --git a/testing/execution_engine_integration/src/main.rs b/testing/execution_engine_integration/src/main.rs
index bd3436602c1..e46bc13c8d3 100644
--- a/testing/execution_engine_integration/src/main.rs
+++ b/testing/execution_engine_integration/src/main.rs
@@ -1,4 +1,3 @@
-#![recursion_limit = "1024"]
 /// This binary runs integration tests between Lighthouse and execution engines.
 ///
 /// It will first attempt to build any supported integration clients, then it will run tests.
diff --git a/testing/simulator/src/main.rs b/testing/simulator/src/main.rs
index 9e05a539cfc..922149537cb 100644
--- a/testing/simulator/src/main.rs
+++ b/testing/simulator/src/main.rs
@@ -1,5 +1,3 @@
-#![recursion_limit = "256"]
-
 //! This crate provides a simluation that creates `n` beacon node and validator clients, each with
 //! `v` validators. A deposit contract is deployed at the start of the simulation using a local
 //! `ganache` instance (you must have `ganache` installed and avaliable on your path). All