diff --git a/beacon_node/eth2-libp2p/Cargo.toml b/beacon_node/eth2-libp2p/Cargo.toml
index d66127df9..550486e98 100644
--- a/beacon_node/eth2-libp2p/Cargo.toml
+++ b/beacon_node/eth2-libp2p/Cargo.toml
@@ -8,8 +8,8 @@ edition = "2018"
 beacon_chain =  { path = "../beacon_chain" }
 clap = "2.32.0"
 # SigP repository 
- libp2p =  { git = "https://github.com/SigP/rust-libp2p", rev = "1c2aa97a338fc9dfd8e804cc47497fb9b8e7ad04" }
-enr =  { git = "https://github.com/SigP/rust-libp2p/", rev = "1c2aa97a338fc9dfd8e804cc47497fb9b8e7ad04", features = ["serde"] }
+ libp2p =  { git = "https://github.com/SigP/rust-libp2p", rev = "8ff9f2001de0aea1175c1442f22bfbf382dc0e8b" }
+enr =  { git = "https://github.com/SigP/rust-libp2p/", rev = "8ff9f2001de0aea1175c1442f22bfbf382dc0e8b", features = ["serde"] }
 types = { path =  "../../eth2/types" }
 serde = "1.0"
 serde_derive = "1.0"
diff --git a/beacon_node/eth2-libp2p/src/discovery.rs b/beacon_node/eth2-libp2p/src/discovery.rs
index 1d4563552..b69f45be7 100644
--- a/beacon_node/eth2-libp2p/src/discovery.rs
+++ b/beacon_node/eth2-libp2p/src/discovery.rs
@@ -171,7 +171,7 @@ where
 
     fn poll(
         &mut self,
-        params: &mut PollParameters,
+        params: &mut impl PollParameters,
     ) -> Async<
         NetworkBehaviourAction<
             <Self::ProtocolsHandler as ProtocolsHandler>::InEvent,
diff --git a/beacon_node/eth2-libp2p/src/rpc/mod.rs b/beacon_node/eth2-libp2p/src/rpc/mod.rs
index 57d7dadbe..2d303469c 100644
--- a/beacon_node/eth2-libp2p/src/rpc/mod.rs
+++ b/beacon_node/eth2-libp2p/src/rpc/mod.rs
@@ -94,7 +94,7 @@ where
 
     fn poll(
         &mut self,
-        _: &mut PollParameters<'_>,
+        _: &mut impl PollParameters,
     ) -> Async<
         NetworkBehaviourAction<
             <Self::ProtocolsHandler as ProtocolsHandler>::InEvent,