diff --git a/.gitignore b/.gitignore
index 634d1b1..1eee89f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,4 @@ results
 npm-debug.log
 node_modules
 coverage
+.nyc_output/
diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..4edc04d
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,21 @@
+lib-cov
+*.seed
+*.log
+*.csv
+*.dat
+*.out
+*.pid
+*.gz
+
+pids
+logs
+results
+
+npm-debug.log
+node_modules
+coverage
+.jshintrc
+.travis.yml
+.nyc_output/
+test/
+CHANGES.md
diff --git a/.travis.yml b/.travis.yml
index ceafed9..bf696d8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 language: node_js
 node_js:
-  - "6"
-  - "8"
-  - "10"
+  - "14"
+  - "16"
+  - "18"
+  - "19"
diff --git a/CHANGES.md b/CHANGES.md
index 1812a03..b10612a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,20 @@
+TBD, Version 2.0.0
+=========================
+
+* Update truncate from 2.x to 3.x
+
+* Update dev dependencies to latest
+
+* Replace deprecated package istanbul with nyc
+
+* Require Node.js 14+ (Breaking change)
+
+* Travis: add Node.js 14,16,18,19 support, remove legacy versions
+
+* Remove instances of deprecated `new Buffer`
+
+* Ensure extraneous files are not bundled into package with .npmignore
+
 2018-05-31, Version 1.0.6
 =========================
 
diff --git a/README.md b/README.md
index e29c212..f1d0852 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,7 @@ uri = dataUri.encode('foo');
 console.log(uri);
 // data:text/plain;charset=UTF-8;base64,Zm9v
 
-uri = dataUri.encode(new Buffer('<foo/>', 'utf8'), 'text/xml');
+uri = dataUri.encode(Buffer.from('<foo/>', 'utf8'), 'text/xml');
 console.log(uri);
 // data:text/xml;base64,PGZvby8+
 ```
diff --git a/index.js b/index.js
index 3dc7304..37c8e72 100644
--- a/index.js
+++ b/index.js
@@ -80,9 +80,9 @@ function decode(uri) {
   }
 
   if (b64) {
-    result = new Buffer(body, 'base64');
+    result = Buffer.from(body, 'base64');
   } else {
-    result = new Buffer(decodeURIComponent(body), 'ascii');
+    result = Buffer.from(decodeURIComponent(body), 'ascii');
   }
 
   result.mimetype  = mimetype;
@@ -100,7 +100,7 @@ function encode(input, mediatype) {
     buf = input;
     mediatype = mediatype || 'application/octet-stream';
   } else if (typeof(input) == 'string') {
-    buf = new Buffer(input, 'utf8');
+    buf = Buffer.from(input, 'utf8');
     mediatype = mediatype || 'text/plain;charset=UTF-8';
   } else {
     // TODO: support streams?
diff --git a/package.json b/package.json
index d53837e..d647af7 100644
--- a/package.json
+++ b/package.json
@@ -6,8 +6,7 @@
   "main": "index.js",
   "scripts": {
     "pretest": "jshint *.js test",
-    "test": "istanbul test -- _mocha -R spec",
-    "posttest": "test -z $npm_config_coverage || istanbul report"
+    "test": "nyc -r lcov _mocha -R spec"
   },
   "repository": {
     "type": "git",
@@ -18,15 +17,15 @@
     "email": "miroslav@strongloop.com"
   },
   "dependencies": {
-    "truncate": "^2.0.1"
+    "truncate": "^3.0.0"
   },
   "devDependencies": {
-    "mocha": "~1.17.1",
-    "jshint": "~2.4.3",
-    "istanbul": "~0.2.4",
-    "chai": "~1.8.1"
+    "chai": "~4.3.7",
+    "jshint": "~2.13.6",
+    "mocha": "~10.2.0",
+    "nyc": "15.1.0"
   },
   "engines": {
-    "node": ">=0.8.0"
+    "node": ">=14"
   }
 }
diff --git a/test/encode.js b/test/encode.js
index 8115b99..c3cb663 100644
--- a/test/encode.js
+++ b/test/encode.js
@@ -31,13 +31,13 @@ var dataUri = require('..');
 
 describe('encode', function() {
   it('creates from buffer', function() {
-    var uri = dataUri.encode(new Buffer('foo', 'utf8'), 'text/plain');
+    var uri = dataUri.encode(Buffer.from('foo', 'utf8'), 'text/plain');
     expect(uri).to.be.a('string');
     expect(uri).to.equal('data:text/plain;base64,Zm9v');
   });
 
   it('creates from buffer with default mediatype', function() {
-    var uri = dataUri.encode(new Buffer('foo', 'utf8'));
+    var uri = dataUri.encode(Buffer.from('foo', 'utf8'));
     expect(uri).to.be.a('string');
     expect(uri).to.equal('data:application/octet-stream;base64,Zm9v');
   });