diff --git a/.travis.yml b/.travis.yml
index 3c3eff4..397dc23 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,14 +1,14 @@
 sudo: false
 language: node_js
 node_js:
-  - "8"
+  - "lts/*"
   - "9"
   - "10"
 matrix:
   include:
-    - node_js: "8"
+    - node_js: "lts/*"
       env: TEST_SUITE=standard
-    - node_js: "8"
+    - node_js: "lts/*"
       env: TEST_SUITE=coverage
 env:
   - TEST_SUITE=unit
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 80a0e2f..10d3eb3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 4.0.1
+__fixed__
+- Fixed `tiny-secp256k1` dependency version (used `ecurve`) (#1139)
+- Fixed `TransactionBuilder` throwing when trying to sign `P2WSH(P2WPKH)` (#1135)
+
 # 4.0.0
 __added__
 - Added [`bip32`](https://github.com/bitcoinjs/bip32) dependency as a primary export (#1073)
diff --git a/package.json b/package.json
index beae8cb..b9be434 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bitcoinjs-lib",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "description": "Client-side Bitcoin JavaScript library",
   "main": "./src/index.js",
   "engines": {
@@ -31,7 +31,7 @@
   ],
   "dependencies": {
     "bech32": "^1.1.2",
-    "bip32": "^0.1.0",
+    "bip32": "^1.0.0",
     "bip66": "^1.1.0",
     "bitcoin-ops": "^1.4.0",
     "bs58check": "^2.0.0",
@@ -41,7 +41,7 @@
     "pushdata-bitcoin": "^1.0.1",
     "randombytes": "^2.0.1",
     "safe-buffer": "^5.1.1",
-    "tiny-secp256k1": "^0.2.2",
+    "tiny-secp256k1": "^1.0.0",
     "typeforce": "^1.11.3",
     "varuint-bitcoin": "^1.0.4",
     "wif": "^2.0.1"
diff --git a/test/integration/crypto.js b/test/integration/crypto.js
index 611b306..864f4e7 100644
--- a/test/integration/crypto.js
+++ b/test/integration/crypto.js
@@ -7,9 +7,6 @@ const bip32 = require('bip32')
 const crypto = require('crypto')
 const tinysecp = require('tiny-secp256k1')
 
-const ecurve = require('ecurve')
-const secp256k1 = ecurve.getCurveByName('secp256k1')
-
 describe('bitcoinjs-lib (crypto)', function () {
   it('can recover a private key from duplicate R values', function () {
     this.timeout(30000)
@@ -29,8 +26,7 @@ describe('bitcoinjs-lib (crypto)', function () {
       input.z = new BN(m)
     })
 
-    // finally, run the tasks, then on to the math
-    const n = new BN(secp256k1.n.toString())
+    const n = new BN('fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141', 16)
 
     for (var i = 0; i < tx.ins.length; ++i) {
       for (var j = i + 1; j < tx.ins.length; ++j) {