diff --git a/bip39-standalone.html b/bip39-standalone.html
index 99fa529..22d7120 100644
--- a/bip39-standalone.html
+++ b/bip39-standalone.html
@@ -22865,8 +22865,7 @@ WORDLISTS = {
 
     function calcBip32Seed(phrase, passphrase, path) {
         var seed = mnemonic.toSeed(phrase, passphrase);
-        var seedHash = Bitcoin.crypto.sha256(seed).toString("hex");
-        bip32RootKey = Bitcoin.HDNode.fromSeedHex(seedHash, network);
+        bip32RootKey = Bitcoin.HDNode.fromSeedHex(seed, network);
         bip32ExtendedKey = bip32RootKey;
         // Derive the key from the path
         var pathBits = path.split("/");
diff --git a/src/js/index.js b/src/js/index.js
index 7f39ad2..cd3a506 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -164,8 +164,7 @@
 
     function calcBip32Seed(phrase, passphrase, path) {
         var seed = mnemonic.toSeed(phrase, passphrase);
-        var seedHash = Bitcoin.crypto.sha256(seed).toString("hex");
-        bip32RootKey = Bitcoin.HDNode.fromSeedHex(seedHash, network);
+        bip32RootKey = Bitcoin.HDNode.fromSeedHex(seed, network);
         bip32ExtendedKey = bip32RootKey;
         // Derive the key from the path
         var pathBits = path.split("/");