diff --git a/substrate/core/network-libp2p/src/service_task.rs b/substrate/core/network-libp2p/src/service_task.rs
index 69181b90ee..4cab435c8b 100644
--- a/substrate/core/network-libp2p/src/service_task.rs
+++ b/substrate/core/network-libp2p/src/service_task.rs
@@ -22,14 +22,13 @@ use crate::custom_proto::{CustomMessage, RegisteredProtocol, RegisteredProtocols
 use crate::{NetworkConfiguration, NodeIndex, ProtocolId, parse_str_addr};
 use fnv::FnvHashMap;
 use futures::{prelude::*, Stream};
-use libp2p::{multiaddr::Protocol, Multiaddr, PeerId, build_multiaddr};
+use libp2p::{multiaddr::Protocol, Multiaddr, PeerId};
 use libp2p::core::{Swarm, nodes::Substream, transport::boxed::Boxed, muxing::StreamMuxerBox};
 use libp2p::core::nodes::ConnectedPoint;
 use log::{debug, error, info, warn};
 use std::collections::hash_map::Entry;
 use std::fs;
 use std::io::{Error as IoError, ErrorKind as IoErrorKind};
-use std::net::SocketAddr;
 use std::path::Path;
 use std::sync::Arc;
 use std::time::{Duration, Instant};
@@ -81,27 +80,8 @@ where TProtos: IntoIterator<Item = RegisteredProtocol<TMessage>>,
 	// Connect to the bootnodes.
 	for bootnode in config.boot_nodes.iter() {
 		match parse_str_addr(bootnode) {
-			Ok((peer_id, _)) => {
-				Swarm::dial(&mut swarm, peer_id);
-			},
-			Err(_) => {
-				// If the format of the bootstrap node is not a multiaddr, try to parse it as
-				// a `SocketAddr`. This corresponds to the format `IP:PORT`.
-				let addr = match bootnode.parse::<SocketAddr>() {
-					Ok(SocketAddr::V4(socket)) => build_multiaddr![Ip4(*socket.ip()), Tcp(socket.port())],
-					Ok(SocketAddr::V6(socket)) => build_multiaddr![Ip6(*socket.ip()), Tcp(socket.port())],
-					_ => {
-						warn!(target: "sub-libp2p", "Not a valid bootnode address: {}", bootnode);
-						continue
-					}
-				};
-
-				info!(target: "sub-libp2p", "Dialing {} with no peer id. Keep in mind that doing \
-					so is vulnerable to man-in-the-middle attacks.", addr);
-				if let Err(addr) = Swarm::dial_addr(&mut swarm, addr) {
-					warn!(target: "sub-libp2p", "Bootstrap address not supported: {}", addr)
-				}
-			},
+			Ok((peer_id, _)) => Swarm::dial(&mut swarm, peer_id),
+			Err(_) => warn!(target: "sub-libp2p", "Not a valid bootnode address: {}", bootnode),
 		}
 	}