diff --git a/.gitignore b/.gitignore
index a834c01..735f4af 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,5 @@
 .DS_Store
 *.log
-.nyc_output/
 coverage/
 node_modules/
-markdown-table.js
-markdown-table.min.js
 yarn.lock
diff --git a/.prettierignore b/.prettierignore
index 3ceaf99..cebe81f 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,5 +1,2 @@
 coverage/
-markdown-table.js
-markdown-table.min.js
-*.json
 *.md
diff --git a/index.js b/index.js
index 4abae08..cfa4e7a 100644
--- a/index.js
+++ b/index.js
@@ -1,11 +1,7 @@
-'use strict'
-
-var repeat = require('repeat-string')
-
-module.exports = markdownTable
+import repeat from 'repeat-string'
 
 // Create a table from a matrix of strings.
-function markdownTable(table, options) {
+export function markdownTable(table, options) {
   var settings = options || {}
   var align = (settings.align || []).concat()
   var stringLength = settings.stringLength || defaultStringLength
diff --git a/package.json b/package.json
index 130acb0..6259508 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,9 @@
   "contributors": [
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
   ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
   "files": [
     "index.js"
   ],
@@ -28,7 +31,7 @@
     "repeat-string": "^1.0.0"
   },
   "devDependencies": {
-    "browserify": "^17.0.0",
+    "c8": "^7.0.0",
     "chalk": "^4.0.0",
     "nyc": "^15.0.0",
     "prettier": "^2.0.0",
@@ -36,17 +39,13 @@
     "remark-preset-wooorm": "^8.0.0",
     "strip-ansi": "^6.0.0",
     "tape": "^5.0.0",
-    "tinyify": "^3.0.0",
     "xo": "^0.38.0"
   },
   "scripts": {
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
-    "build-bundle": "browserify . -s markdownTable -o markdown-table.js",
-    "build-mangle": "browserify . -s markdownTable -p tinyify -o markdown-table.min.js",
-    "build": "npm run build-bundle && npm run build-mangle",
-    "test-api": "node test",
-    "test-coverage": "nyc --reporter lcov tape test.js",
-    "test": "npm run format && npm run build && npm run test-coverage"
+    "test-api": "node test.js",
+    "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov node test.js",
+    "test": "npm run format && npm run test-coverage"
   },
   "remarkConfig": {
     "plugins": [
@@ -63,13 +62,11 @@
   },
   "xo": {
     "prettier": true,
-    "esnext": false,
     "rules": {
-      "complexity": "off"
-    },
-    "ignores": [
-      "markdown-table.js"
-    ]
+      "complexity": "off",
+      "no-var": "off",
+      "prefer-arrow-callback": "off"
+    }
   },
   "nyc": {
     "check-coverage": true,
diff --git a/readme.md b/readme.md
index 2998b31..a7cf92c 100644
--- a/readme.md
+++ b/readme.md
@@ -9,6 +9,9 @@ Generate fancy [Markdown][fancy] tables.
 
 ## Install
 
+This package is ESM only: Node 12+ is needed to use it and it must be `import`ed
+instead of `require`d.
+
 [npm][]:
 
 ```sh
@@ -20,9 +23,9 @@ npm install markdown-table
 Typical usage (defaults to align left):
 
 ```js
-var table = require('markdown-table')
+import {markdownTable} from 'markdown-table'
 
-table([
+markdownTable([
   ['Branch', 'Commit'],
   ['main', '0123456789abcdef'],
   ['staging', 'fedcba9876543210']
@@ -41,7 +44,7 @@ Yields:
 With align:
 
 ```js
-table(
+markdownTable(
   [
     ['Beep', 'No.', 'Boop'],
     ['beep', '1024', 'xyz'],
@@ -66,6 +69,9 @@ Yields:
 
 ## API
 
+This package exports the following identifiers: `markdownTable`.
+There is no default export.
+
 ### `markdownTable(table[, options])`
 
 Turns a given matrix of strings (an array of arrays of strings) into a table.
@@ -179,7 +185,7 @@ length of a cell (note that what is and isn’t visible depends on your editor).
 Without such a function, the following:
 
 ```js
-table([
+markdownTable([
   ['Alpha', 'Bravo'],
   ['中文', 'Charlie'],
   ['👩‍❤️‍👩', 'Delta']
@@ -200,7 +206,7 @@ With [`string-width`][string-width]:
 ```js
 var width = require('string-width')
 
-table(
+markdownTable(
   [
     ['Alpha', 'Bravo'],
     ['中文', 'Charlie'],
diff --git a/test.js b/test.js
index 5542334..7953b30 100644
--- a/test.js
+++ b/test.js
@@ -1,13 +1,11 @@
-'use strict'
+import test from 'tape'
+import chalk from 'chalk'
+import strip from 'strip-ansi'
+import {markdownTable} from './index.js'
 
-var test = require('tape')
-var chalk = require('chalk')
-var strip = require('strip-ansi')
-var table = require('.')
-
-test('table()', function (t) {
+test('markdownTable()', function (t) {
   t.equal(
-    table([
+    markdownTable([
       ['Branch', 'Commit'],
       ['main', '0123456789abcdef'],
       ['staging', 'fedcba9876543210']
@@ -22,7 +20,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table([
+    markdownTable([
       ['Type', 'Value'],
       ['string', 'alpha'],
       ['number', 1],
@@ -45,7 +43,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table(
+    markdownTable(
       [
         ['A', 'B', 'C'],
         ['a', 'b', 'c'],
@@ -77,7 +75,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table(
+    markdownTable(
       [
         ['Beep', 'No.'],
         ['boop', '33450'],
@@ -97,7 +95,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table(
+    markdownTable(
       [
         ['Beep', 'No.', 'Boop'],
         ['beep', '1024', 'xyz'],
@@ -119,7 +117,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table(
+    markdownTable(
       [
         ['Very long', 'Even longer'],
         ['boop', '33450'],
@@ -139,7 +137,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table(
+    markdownTable(
       [
         ['Beep', 'No.', 'Boop'],
         ['beep', '1024', 'xyz'],
@@ -161,7 +159,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table(
+    markdownTable(
       [
         ['Branch', 'Commit'],
         ['main', '0123456789abcdef'],
@@ -179,7 +177,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table(
+    markdownTable(
       [
         ['Branch', 'Commit', 'Beep', 'No.', 'Boop'],
         ['main', '0123456789abcdef', 'beep', '1024', 'xyz'],
@@ -197,7 +195,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table(
+    markdownTable(
       [
         ['A'],
         ['', '0123456789abcdef'],
@@ -217,7 +215,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table(
+    markdownTable(
       [
         ['Branch', 'Commit'],
         ['main', '0123456789abcdef'],
@@ -237,7 +235,7 @@ test('table()', function (t) {
   )
 
   t.equal(
-    table(
+    markdownTable(
       [
         ['Branch', 'Commit'],
         ['main', '0123456789abcdef'],
@@ -258,7 +256,7 @@ test('table()', function (t) {
 
   t.equal(
     strip(
-      table(
+      markdownTable(
         [
           ['A', 'B', 'C'],
           [chalk.red('Red'), chalk.green('Green'), chalk.blue('Blue')],
@@ -270,7 +268,7 @@ test('table()', function (t) {
           ],
           ['bar', '45', 'lmno']
         ],
-        {align: ['', 'c', 'r'], stringLength: stringLength}
+        {align: ['', 'c', 'r'], stringLength}
       )
     ),
     [