diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..0c72941
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+rustflags = ["-Ctarget-cpu=native", "-Ctarget-feature=+aes,+sha,+sse,+sse2,+avx,+avx2"]
\ No newline at end of file
diff --git a/src/p2p/network.rs b/src/p2p/network.rs
index 70b7435..3e220d8 100644
--- a/src/p2p/network.rs
+++ b/src/p2p/network.rs
@@ -2,7 +2,7 @@ extern crate serde;
 extern crate serde_json;
 
 use std::{io, thread};
-use std::io::{Read, Write, Error};
+use std::io::{Read, Write};
 use std::sync::{Arc, Mutex, MutexGuard};
 use std::time::{Duration, Instant};