diff --git a/package.json b/package.json
index eac5bc9..f1e7847 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   "type": "commonjs",
   "dependencies": {},
   "devDependencies": {
-    "tap": "~13.1.11"
+    "tap": "~11.1.5"
   },
   "optionalDependencies": {},
   "engines": {
diff --git a/tests/crc.test.js b/tests/crc.test.js
index cbf11fe..048801b 100644
--- a/tests/crc.test.js
+++ b/tests/crc.test.js
@@ -2,36 +2,36 @@ const crc32 = require('..');
 const test = require('tap').test;
 
 test('simple crc32 is no problem', function (t) {
-  var input = new Buffer('hey sup bros');
-  var expected = new Buffer([0x47, 0xfa, 0x55, 0x70]);
+  var input = Buffer.from('hey sup bros');
+  var expected = Buffer.from([0x47, 0xfa, 0x55, 0x70]);
   t.same(crc32(input), expected);
   t.end();
 });
 
 test('another simple one', function (t) {
-  var input = new Buffer('IEND');
-  var expected = new Buffer([0xae, 0x42, 0x60, 0x82]);
+  var input = Buffer.from('IEND');
+  var expected = Buffer.from([0xae, 0x42, 0x60, 0x82]);
   t.same(crc32(input), expected);
   t.end();
 });
 
 test('slightly more complex', function (t) {
-  var input = new Buffer([0x00, 0x00, 0x00]);
-  var expected = new Buffer([0xff, 0x41, 0xd9, 0x12]);
+  var input = Buffer.from([0x00, 0x00, 0x00]);
+  var expected = Buffer.from([0xff, 0x41, 0xd9, 0x12]);
   t.same(crc32(input), expected);
   t.end();
 });
 
 test('complex crc32 gets calculated like a champ', function (t) {
-  var input = new Buffer('शीर्षक');
-  var expected = new Buffer([0x17, 0xb8, 0xaf, 0xf1]);
+  var input = Buffer.from('शीर्षक');
+  var expected = Buffer.from([0x17, 0xb8, 0xaf, 0xf1]);
   t.same(crc32(input), expected);
   t.end();
 });
 
 test('casts to buffer if necessary', function (t) {
   var input = 'शीर्षक';
-  var expected = new Buffer([0x17, 0xb8, 0xaf, 0xf1]);
+  var expected = Buffer.from([0x17, 0xb8, 0xaf, 0xf1]);
   t.same(crc32(input), expected);
   t.end();
 });
@@ -52,8 +52,8 @@ test('can do unsigned', function (t) {
 
 
 test('simple crc32 in append mode', function (t) {
-  var input = [new Buffer('hey'), new Buffer(' '), new Buffer('sup'), new Buffer(' '), new Buffer('bros')];
-  var expected = new Buffer([0x47, 0xfa, 0x55, 0x70]);
+  var input = [Buffer.from('hey'), Buffer.from(' '), Buffer.from('sup'), Buffer.from(' '), Buffer.from('bros')];
+  var expected = Buffer.from([0x47, 0xfa, 0x55, 0x70]);
   for (var crc = 0, i = 0; i < input.length; i++) {
     crc = crc32(input[i], crc);
   }
@@ -78,7 +78,7 @@ test('can do signed in append mode', function (t) {
 
 test('make sure crc32 can accept integers as first arg ', function (t) {
   try {
-    t.same(crc32(0), new Buffer([0x00, 0x00, 0x00, 0x00]));
+    t.same(crc32(0), Buffer.from([0x00, 0x00, 0x00, 0x00]));
   } catch (e) {
     t.fail("should be able to accept integer");
   } finally {