diff --git a/instant-segment/Cargo.toml b/instant-segment/Cargo.toml
index 84b249f..e2f71d9 100644
--- a/instant-segment/Cargo.toml
+++ b/instant-segment/Cargo.toml
@@ -13,10 +13,10 @@ readme = "../README.md"
 [features]
 __test_data = ["test-cases"]
 test-cases = []
-with-serde = ["serde", "ahash/serde", "smartstring/serde"]
+with-serde = ["serde", "smartstring/serde"]
 
 [dependencies]
-ahash = "0.8"
+rustc-hash = "1.1.0"
 smartstring = "1"
 serde = { version = "1.0.123", features = ["derive"], optional = true }
 
diff --git a/instant-segment/examples/merge.rs b/instant-segment/examples/merge.rs
index 9702524..ea45279 100644
--- a/instant-segment/examples/merge.rs
+++ b/instant-segment/examples/merge.rs
@@ -4,12 +4,12 @@
 //! data files from publicly available sources. See the README in `/data`.
 
 use std::cmp::Reverse;
+use std::collections::{HashMap, HashSet};
 use std::fs::File;
 use std::io::Write;
 use std::io::{BufRead, BufReader, BufWriter};
 use std::str::FromStr;
 
-use ahash::{AHashMap as HashMap, AHashSet as HashSet};
 use rayon::iter::{IntoParallelIterator, ParallelIterator};
 use smartstring::alias::String as SmartString;
 
diff --git a/instant-segment/src/lib.rs b/instant-segment/src/lib.rs
index d5052d3..56fc6ca 100644
--- a/instant-segment/src/lib.rs
+++ b/instant-segment/src/lib.rs
@@ -256,7 +256,7 @@ impl std::fmt::Display for InvalidCharacter {
     }
 }
 
-type HashMap<K, V> = std::collections::HashMap<K, V, ahash::RandomState>;
+type HashMap<K, V> = rustc_hash::FxHashMap<K, V>;
 
 const DEFAULT_LIMIT: usize = 24;