diff --git a/beacon_node/http_api/src/lib.rs b/beacon_node/http_api/src/lib.rs
index 02ea9518c69..437c968bd2b 100644
--- a/beacon_node/http_api/src/lib.rs
+++ b/beacon_node/http_api/src/lib.rs
@@ -4661,8 +4661,10 @@ pub fn serve<T: BeaconChainTypes>(
                         post_beacon_blocks_ssz
                             .uor(post_beacon_blocks_v2_ssz)
                             .uor(post_beacon_blinded_blocks_ssz)
-                            .uor(post_beacon_blinded_blocks_v2_ssz),
+                            .uor(post_beacon_blinded_blocks_v2_ssz)
+                            .boxed(),
                     )
+                    .boxed()
                     .uor(post_beacon_blocks)
                     .uor(post_beacon_blinded_blocks)
                     .uor(post_beacon_blocks_v2)
@@ -4694,6 +4696,7 @@ pub fn serve<T: BeaconChainTypes>(
                     .recover(warp_utils::reject::handle_rejection),
             ),
         )
+        .boxed()
         .recover(warp_utils::reject::handle_rejection)
         .with(slog_logging(log.clone()))
         .with(prometheus_metrics())