diff --git a/lib/blockchain/chainentry.js b/lib/blockchain/chainentry.js
index 67ee55cb..b18d0e3f 100644
--- a/lib/blockchain/chainentry.js
+++ b/lib/blockchain/chainentry.js
@@ -400,7 +400,7 @@ ChainEntry.prototype.toRaw = function toRaw() {
   bw.writeU32(this.bits);
   bw.writeU32(this.nonce);
   bw.writeU32(this.height);
-  bw.writeBytes(this.chainwork.toBuffer('le', 32));
+  bw.writeBytes(this.chainwork.toArrayLike(Buffer, 'le', 32));
 
   return bw.render();
 };
diff --git a/lib/crypto/rsa-browser.js b/lib/crypto/rsa-browser.js
index 4f86783c..6029fafc 100644
--- a/lib/crypto/rsa-browser.js
+++ b/lib/crypto/rsa-browser.js
@@ -140,7 +140,7 @@ rsa.decrypt = function decrypt(N, D, m) {
     .toRed(BN.red(N))
     .redPow(D)
     .fromRed()
-    .toBuffer('be');
+    .toArrayLike(Buffer, 'be');
 };
 
 /**
@@ -156,7 +156,7 @@ rsa.encrypt = function encrypt(N, e, m) {
     .toRed(BN.red(N))
     .redPow(e)
     .fromRed()
-    .toBuffer('be');
+    .toArrayLike(Buffer, 'be');
 };
 
 /*
diff --git a/lib/crypto/schnorr.js b/lib/crypto/schnorr.js
index dc667048..6aa21b0e 100644
--- a/lib/crypto/schnorr.js
+++ b/lib/crypto/schnorr.js
@@ -29,7 +29,7 @@ const schnorr = exports;
  */
 
 schnorr.hash = function hash(msg, r) {
-  const R = r.toBuffer('be', 32);
+  const R = r.toArrayLike(Buffer, 'be', 32);
   const B = POOL64;
 
   R.copy(B, 0);
diff --git a/lib/crypto/secp256k1-browser.js b/lib/crypto/secp256k1-browser.js
index 9fc9a398..be0a3020 100644
--- a/lib/crypto/secp256k1-browser.js
+++ b/lib/crypto/secp256k1-browser.js
@@ -35,7 +35,7 @@ ec.binding = false;
 
 ec.generatePrivateKey = function generatePrivateKey() {
   const key = secp256k1.genKeyPair();
-  return key.getPrivate().toBuffer('be', 32);
+  return key.getPrivate().toArrayLike(Buffer, 'be', 32);
 };
 
 /**
@@ -82,7 +82,7 @@ ec.privateKeyTweakAdd = function privateKeyTweakAdd(privateKey, tweak) {
   const key = new BN(tweak)
     .add(new BN(privateKey))
     .mod(curve.n)
-    .toBuffer('be', 32);
+    .toArrayLike(Buffer, 'be', 32);
 
   // Only a 1 in 2^127 chance of happening.
   if (!ec.privateKeyVerify(key))
@@ -123,7 +123,7 @@ ec.publicKeyTweakAdd = function publicKeyTweakAdd(publicKey, tweak, compress) {
 ec.ecdh = function ecdh(pub, priv) {
   priv = secp256k1.keyPair({ priv: priv });
   pub = secp256k1.keyPair({ pub: pub });
-  return priv.derive(pub.getPublic()).toBuffer('be', 32);
+  return priv.derive(pub.getPublic()).toArrayLike(Buffer, 'be', 32);
 };
 
 /**
@@ -243,8 +243,8 @@ ec.fromDER = function fromDER(raw) {
   const sig = new Signature(raw);
   const out = Buffer.allocUnsafe(64);
 
-  sig.r.toBuffer('be', 32).copy(out, 0);
-  sig.s.toBuffer('be', 32).copy(out, 32);
+  sig.r.toArrayLike(Buffer, 'be', 32).copy(out, 0);
+  sig.s.toArrayLike(Buffer, 'be', 32).copy(out, 32);
 
   return out;
 };
diff --git a/lib/mining/common.js b/lib/mining/common.js
index 75105f91..2740ace6 100644
--- a/lib/mining/common.js
+++ b/lib/mining/common.js
@@ -135,7 +135,7 @@ common.getTarget = function getTarget(bits) {
   if (target.cmpn(0) === 0)
     throw new Error('Target is zero.');
 
-  return target.toBuffer('le', 32);
+  return target.toArrayLike(Buffer, 'le', 32);
 };
 
 /**