diff --git a/modules/abstract-utxo/package.json b/modules/abstract-utxo/package.json
index 6e0acbd80c..169fffdf81 100644
--- a/modules/abstract-utxo/package.json
+++ b/modules/abstract-utxo/package.json
@@ -65,7 +65,6 @@
     "@bitgo/sdk-core": "^37.3.0",
     "@bitgo/utxo-core": "^1.39.0",
     "@bitgo/utxo-descriptors": "^1.3.0",
-    "@bitgo/utxo-lib": "^11.22.1",
     "@bitgo/utxo-ord": "^1.32.0",
     "@bitgo/wasm-utxo": "^4.16.0",
     "@types/lodash": "^4.14.121",
@@ -78,6 +77,7 @@
   },
   "devDependencies": {
     "@bitgo/sdk-test": "^9.1.46",
+    "@bitgo/utxo-lib": "^11.22.1",
     "mocha": "^10.2.0"
   },
   "gitHead": "18e460ddf02de2dbf13c2aa243478188fb539f0c"
diff --git a/modules/abstract-utxo/src/keychains.ts b/modules/abstract-utxo/src/keychains.ts
index 073b40a848..2903a556bf 100644
--- a/modules/abstract-utxo/src/keychains.ts
+++ b/modules/abstract-utxo/src/keychains.ts
@@ -1,7 +1,6 @@
 import assert from 'assert';
 
 import * as t from 'io-ts';
-import { bitgo } from '@bitgo/utxo-lib';
 import { IRequestTracer, IWallet, KeyIndices, promiseProps, Triple } from '@bitgo/sdk-core';
 import { BIP32, bip32, fixedScriptWallet } from '@bitgo/wasm-utxo';
 
@@ -48,10 +47,10 @@ export function toKeychainTriple(keychains: UtxoNamedKeychains): Triple<UtxoKeyc
 }
 
 export function toBip32Triple(
-  keychains: bitgo.RootWalletKeys | UtxoNamedKeychains | Triple<{ pub: string }> | string[]
+  keychains: fixedScriptWallet.RootWalletKeys | UtxoNamedKeychains | Triple<{ pub: string }> | string[]
 ): Triple<BIP32> {
-  if (keychains instanceof bitgo.RootWalletKeys) {
-    return keychains.triple.map((k) => BIP32.fromBase58(k.toBase58())) as Triple<BIP32>;
+  if (keychains instanceof fixedScriptWallet.RootWalletKeys) {
+    return [keychains.userKey(), keychains.backupKey(), keychains.bitgoKey()];
   }
   if (Array.isArray(keychains)) {
     if (keychains.length !== 3) {
diff --git a/modules/abstract-utxo/src/wasmUtil.ts b/modules/abstract-utxo/src/wasmUtil.ts
deleted file mode 100644
index f22e4fcf50..0000000000
--- a/modules/abstract-utxo/src/wasmUtil.ts
+++ /dev/null
@@ -1,74 +0,0 @@
-import { BIP32, bip32, ECPair, Psbt, descriptorWallet } from '@bitgo/wasm-utxo';
-import * as utxolib from '@bitgo/utxo-lib';
-
-export type BIP32Key = BIP32 | bip32.BIP32Interface | utxolib.BIP32Interface;
-export type ECPairKey = ECPair | utxolib.ECPairInterface | Uint8Array;
-export type UtxoLibPsbt = utxolib.Psbt | utxolib.bitgo.UtxoPsbt;
-
-/**
- * Map of descriptor name to Descriptor instance.
- * Re-exported from wasm-utxo for consistency.
- */
-export type DescriptorMap = descriptorWallet.DescriptorMap;
-
-/**
- * Key type accepted by descriptorWallet.signWithKey
- */
-export type SignerKey = Parameters<typeof descriptorWallet.signWithKey>[1];
-
-/**
- * Convert a utxo-lib BIP32Interface to a wasm-utxo BIP32 instance.
- * Preserves private key by using base58 serialization.
- */
-export function toWasmBIP32(key: BIP32Key): BIP32 {
-  if (key instanceof BIP32) {
-    return key;
-  }
-  // All utxo-lib BIP32Interface instances have toBase58
-  return BIP32.fromBase58(key.toBase58());
-}
-
-/**
- * Convert a wasm-utxo BIP32 to a utxo-lib BIP32Interface.
- * Used at boundaries where utxo-lib APIs require their own BIP32Interface type.
- */
-export function toUtxolibBIP32(key: BIP32Key): utxolib.BIP32Interface {
-  return utxolib.bip32.fromBase58(key.toBase58());
-}
-
-export function toWasmECPair(key: ECPairKey): ECPair {
-  if (key instanceof ECPair) {
-    return key;
-  }
-  if (key instanceof Uint8Array) {
-    return ECPair.from(key);
-  }
-  if (key.privateKey) {
-    return ECPair.fromPrivateKey(key.privateKey);
-  }
-  return ECPair.fromPublicKey(key.publicKey);
-}
-
-export function isUtxoLibPsbt(psbt: unknown): psbt is UtxoLibPsbt {
-  return psbt instanceof utxolib.Psbt || psbt instanceof utxolib.bitgo.UtxoPsbt;
-}
-
-export function toWasmPsbt(psbt: Psbt | UtxoLibPsbt | Uint8Array): Psbt {
-  if (psbt instanceof Psbt) {
-    return psbt;
-  }
-  if (psbt instanceof Uint8Array) {
-    return Psbt.deserialize(psbt);
-  }
-  if (isUtxoLibPsbt(psbt)) {
-    return Psbt.deserialize(psbt.toBuffer());
-  }
-  throw new Error('Unsupported PSBT type');
-}
-
-/**
- * Sum the `value` property of an array of objects.
- */
-export function sumValues(arr: { value: bigint }[]): bigint {
-  return arr.reduce((sum, e) => sum + e.value, BigInt(0));
-}