diff --git a/bip0032/Cargo.toml b/bip0032/Cargo.toml
index 8552065..fd32a2b 100644
--- a/bip0032/Cargo.toml
+++ b/bip0032/Cargo.toml
@@ -34,9 +34,6 @@ default = ["std", "k256"]
 std = [
     "anyhow/std",
     "bs58/std",
-    "hmac/std",
-    "ripemd/std",
-    "sha2/std",
     "zeroize/std",
     "k256?/std",
     "secp256k1?/std",
@@ -56,9 +53,9 @@ ed25519-dalek = ["slip10", "dep:ed25519-dalek"]
 [dependencies]
 anyhow = { version = "1.0", default-features = false }
 bs58 = { version = "0.5", default-features = false, features = ["alloc", "check"] }
-hmac = { version = "0.12", default-features = false }
-ripemd = { version = "0.1", default-features = false }
-sha2 = { version = "0.10", default-features = false }
+hmac = { version = "0.13", default-features = false }
+ripemd = { version = "0.2", default-features = false }
+sha2 = { version = "0.11", default-features = false }
 zeroize = { version = "1.8", default-features = false }
 
 ###############################################################################
diff --git a/bip0032/src/xkey/core/mod.rs b/bip0032/src/xkey/core/mod.rs
index 0a0ac1a..bc6b42c 100644
--- a/bip0032/src/xkey/core/mod.rs
+++ b/bip0032/src/xkey/core/mod.rs
@@ -1,6 +1,6 @@
 //! Shared extended key functionality.
 
-use hmac::{Hmac, Mac};
+use hmac::{Hmac, KeyInit, Mac};
 use sha2::Sha512;
 use zeroize::Zeroize;