diff --git a/crates/core/Cargo.toml b/crates/core/Cargo.toml
index 172e8d60d..05efb1cf2 100644
--- a/crates/core/Cargo.toml
+++ b/crates/core/Cargo.toml
@@ -65,6 +65,7 @@ map-fxhash = ["alloy-primitives/map-fxhash"]
 
 getrandom = ["alloy-primitives/getrandom"]
 rand = ["alloy-primitives/rand"]
+rayon = ["alloy-primitives/rayon"]
 rlp = ["alloy-primitives/rlp", "dep:alloy-rlp"]
 serde = ["alloy-primitives/serde"]
 k256 = ["alloy-primitives/k256"]
diff --git a/crates/primitives/Cargo.toml b/crates/primitives/Cargo.toml
index 9fd6ad059..81076830e 100644
--- a/crates/primitives/Cargo.toml
+++ b/crates/primitives/Cargo.toml
@@ -132,6 +132,7 @@ map-fxhash = ["map", "dep:rustc-hash"]
 getrandom = ["dep:getrandom"]
 k256 = ["dep:k256"]
 rand = ["dep:rand", "getrandom", "ruint/rand", "rustc-hash?/rand"]
+rayon = ["hashbrown?/rayon", "indexmap?/rayon"]
 rlp = ["dep:alloy-rlp", "ruint/alloy-rlp"]
 serde = [
     "dep:serde",