diff --git a/Cargo.toml b/Cargo.toml
index d03d6d4..073c15f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,6 +30,7 @@ net2 = "0.2.33"
 parking_lot = "0.9.0"
 privdrop = "0.3.3"
 rand = "0.7.2"
+rustc-hash = "1"
 serde = "1.0.102"
 serde_derive = "1.0.102"
 serde-big-array = "0.2.0"
diff --git a/src/blacklist.rs b/src/blacklist.rs
index ad644b1..5b9d99b 100644
--- a/src/blacklist.rs
+++ b/src/blacklist.rs
@@ -1,6 +1,6 @@
 use crate::errors::*;
 
-use std::collections::HashMap;
+use rustc_hash::FxHashMap;
 use std::fs::File;
 use std::io::{BufRead, BufReader};
 use std::path::Path;
@@ -10,7 +10,7 @@ const MAX_ITERATIONS: usize = 5;
 
 #[derive(Debug)]
 struct BlackListInner {
-    map: HashMap<Vec<u8>, ()>,
+    map: FxHashMap<Vec<u8>, ()>,
 }
 
 #[derive(Clone, Debug)]
@@ -20,7 +20,7 @@ pub struct BlackList {
 }
 
 impl BlackList {
-    pub fn new(map: HashMap<Vec<u8>, ()>, max_iterations: usize) -> Self {
+    pub fn new(map: FxHashMap<Vec<u8>, ()>, max_iterations: usize) -> Self {
         let inner = Arc::new(BlackListInner { map });
         BlackList {
             inner,
@@ -29,7 +29,7 @@ impl BlackList {
     }
 
     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Error> {
-        let mut map = HashMap::new();
+        let mut map = FxHashMap::default();
         let fp = BufReader::new(File::open(path)?);
         for (line_nb, line) in fp.lines().enumerate() {
             let line = line?;