diff --git a/Cargo.lock b/Cargo.lock
index d94ff0804..0f2a13125 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2270,6 +2270,7 @@ dependencies = [
  "bytemuck",
  "byteorder",
  "either",
+ "rayon",
  "tempfile",
 ]
 
diff --git a/crates/milli/Cargo.toml b/crates/milli/Cargo.toml
index ccf6877cd..1a3bfbcf1 100644
--- a/crates/milli/Cargo.toml
+++ b/crates/milli/Cargo.toml
@@ -28,7 +28,7 @@ flatten-serde-json = { path = "../flatten-serde-json" }
 fst = "0.4.7"
 fxhash = "0.2.1"
 geoutils = "0.5.1"
-grenad = { version = "0.5.0", default-features = false, features = ["tempfile"] }
+grenad = { version = "0.5.0", default-features = false, features = ["rayon", "tempfile"] }
 heed = { version = "0.20.3", default-features = false, features = [
     "serde-json",
     "serde-bincode",