diff --git a/bip32/Cargo.toml b/bip32/Cargo.toml
index 0df44a9b..db9ccdcd 100644
--- a/bip32/Cargo.toml
+++ b/bip32/Cargo.toml
@@ -29,7 +29,7 @@ zeroize = { version = "1", default-features = false }
 k256 = { version = "0.13", optional = true, default-features = false, features = ["ecdsa", "sha256"] }
 once_cell = { version = "1", optional = true }
 pbkdf2 = { version = "0.12", optional = true, default-features = false, features = ["hmac"] }
-secp256k1-ffi = { package = "secp256k1", version = "0.27", optional = true }
+secp256k1-ffi = { package = "secp256k1", version = "0.27", optional = true, default-features = false, features = ["alloc"] }
 
 [dev-dependencies]
 hex-literal = "0.4"