diff --git a/starlark_map/Cargo.toml b/starlark_map/Cargo.toml
index 0faab2642..19903c2fa 100644
--- a/starlark_map/Cargo.toml
+++ b/starlark_map/Cargo.toml
@@ -15,7 +15,7 @@ allocative = { workspace = true, features = ["hashbrown"] }
 dupe = { workspace = true }
 
 equivalent = { workspace = true }
-fnv = "1.0.7"
+fxhash = "0.2.1"
 hashbrown = { version = "0.12.3", features = ["raw"] }
 serde = { version = "1.0", features = ["derive"] }
 
diff --git a/starlark_map/src/hasher.rs b/starlark_map/src/hasher.rs
index a85422637..0443c6599 100644
--- a/starlark_map/src/hasher.rs
+++ b/starlark_map/src/hasher.rs
@@ -19,7 +19,7 @@ use std::hash::BuildHasher;
 use std::hash::Hasher;
 
 use dupe::Dupe;
-use fnv::FnvHasher;
+use fxhash::FxHasher64;
 
 use crate::hash_value::StarlarkHashValue;
 
@@ -27,7 +27,10 @@ use crate::hash_value::StarlarkHashValue;
 ///
 /// Starlark relies on stable hashing, and this is the hasher.
 #[derive(Default)]
-pub struct StarlarkHasher(FnvHasher);
+pub struct StarlarkHasher(
+    // TODO(nga): `FxHasher64` is endian-dependent, this is not right.
+    FxHasher64,
+);
 
 impl StarlarkHasher {
     /// Creates a new hasher.