diff --git a/.gitignore b/.gitignore
index 7a5d2ef..4175924 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 node_modules
-wkt.build.js
+dist
+
diff --git a/PUBLISHING.md b/PUBLISHING.md
new file mode 100644
index 0000000..3e145d5
--- /dev/null
+++ b/PUBLISHING.md
@@ -0,0 +1,18 @@
+# Publishing
+
+Make sure you have the latest from the main branch:
+
+    git pull origin main
+
+Use `npm version` to update the version number in the `package.json`.
+
+    npm version {patch|minor|major} --no-git-tag-version
+
+Then run the publish script
+
+   ./publish.sh
+
+afterwards don't forget to update the versions to be a prerelease of the next version, so if you just published 1.1.1 then:
+
+    npm version 1.1.2-dev
+    git push --follow-tags
diff --git a/package.json b/package.json
index 7c4fd70..8bff9ef 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "wkt-parser",
   "version": "1.3.3",
   "description": "wkt-parser ===",
-  "main": "wkt.build.js",
+  "main": "dist/wkt.cjs",
   "module": "index.js",
   "scripts": {
     "test": "node -r esm test.js",
diff --git a/publish.sh b/publish.sh
new file mode 100644
index 0000000..62afab1
--- /dev/null
+++ b/publish.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# get current version
+VERSION=$(node -e "console.log(require('./package.json').version)")
+
+# Build
+git checkout -b build
+npm run build
+git add dist -f
+git commit -m "build $VERSION"
+
+# Tag and push
+git tag -f v$VERSION -m "$VERSION"
+git push --tags git@github.com:proj4js/wkt-parser.git $VERSION
+
+# Publish
+npm publish
+
+# Cleanup
+git checkout main
+git branch -D build
diff --git a/rollup.config.mjs b/rollup.config.mjs
index 8f48ec2..f1c3f92 100644
--- a/rollup.config.mjs
+++ b/rollup.config.mjs
@@ -2,7 +2,7 @@
 export default {
   input: 'index.js',
   output: {
-    file: 'wkt.build.js',
+    file: 'dist/wkt.cjs',
     format: 'cjs'
   }
 };
diff --git a/test.js b/test.js
index e191bfe..807c137 100644
--- a/test.js
+++ b/test.js
@@ -1,6 +1,6 @@
 var test = require('tape');
 import compare from 'js-struct-compare';
-var wktParser = require('./wkt.build.js');
+var wktParser = require('./dist/wkt.cjs');
 var fixtures = require('./test-fixtures.json');
 
 fixtures.forEach((item, i)=>{
diff --git a/wkt.build.js b/wkt.build.js
deleted file mode 100644
index e9c8176..0000000
--- a/wkt.build.js
+++ /dev/null
@@ -1,487 +0,0 @@
-'use strict';
-
-var NEUTRAL = 1;
-var KEYWORD = 2;
-var NUMBER = 3;
-var QUOTED = 4;
-var AFTERQUOTE = 5;
-var ENDED = -1;
-var whitespace = /\s/;
-var latin = /[A-Za-z]/;
-var keyword = /[A-Za-z84_]/;
-var endThings = /[,\]]/;
-var digets = /[\d\.E\-\+]/;
-// const ignoredChar = /[\s_\-\/\(\)]/g;
-function Parser(text) {
-  if (typeof text !== 'string') {
-    throw new Error('not a string');
-  }
-  this.text = text.trim();
-  this.level = 0;
-  this.place = 0;
-  this.root = null;
-  this.stack = [];
-  this.currentObject = null;
-  this.state = NEUTRAL;
-}
-Parser.prototype.readCharicter = function() {
-  var char = this.text[this.place++];
-  if (this.state !== QUOTED) {
-    while (whitespace.test(char)) {
-      if (this.place >= this.text.length) {
-        return;
-      }
-      char = this.text[this.place++];
-    }
-  }
-  switch (this.state) {
-    case NEUTRAL:
-      return this.neutral(char);
-    case KEYWORD:
-      return this.keyword(char)
-    case QUOTED:
-      return this.quoted(char);
-    case AFTERQUOTE:
-      return this.afterquote(char);
-    case NUMBER:
-      return this.number(char);
-    case ENDED:
-      return;
-  }
-};
-Parser.prototype.afterquote = function(char) {
-  if (char === '"') {
-    this.word += '"';
-    this.state = QUOTED;
-    return;
-  }
-  if (endThings.test(char)) {
-    this.word = this.word.trim();
-    this.afterItem(char);
-    return;
-  }
-  throw new Error('havn\'t handled "' +char + '" in afterquote yet, index ' + this.place);
-};
-Parser.prototype.afterItem = function(char) {
-  if (char === ',') {
-    if (this.word !== null) {
-      this.currentObject.push(this.word);
-    }
-    this.word = null;
-    this.state = NEUTRAL;
-    return;
-  }
-  if (char === ']') {
-    this.level--;
-    if (this.word !== null) {
-      this.currentObject.push(this.word);
-      this.word = null;
-    }
-    this.state = NEUTRAL;
-    this.currentObject = this.stack.pop();
-    if (!this.currentObject) {
-      this.state = ENDED;
-    }
-
-    return;
-  }
-};
-Parser.prototype.number = function(char) {
-  if (digets.test(char)) {
-    this.word += char;
-    return;
-  }
-  if (endThings.test(char)) {
-    this.word = parseFloat(this.word);
-    this.afterItem(char);
-    return;
-  }
-  throw new Error('havn\'t handled "' +char + '" in number yet, index ' + this.place);
-};
-Parser.prototype.quoted = function(char) {
-  if (char === '"') {
-    this.state = AFTERQUOTE;
-    return;
-  }
-  this.word += char;
-  return;
-};
-Parser.prototype.keyword = function(char) {
-  if (keyword.test(char)) {
-    this.word += char;
-    return;
-  }
-  if (char === '[') {
-    var newObjects = [];
-    newObjects.push(this.word);
-    this.level++;
-    if (this.root === null) {
-      this.root = newObjects;
-    } else {
-      this.currentObject.push(newObjects);
-    }
-    this.stack.push(this.currentObject);
-    this.currentObject = newObjects;
-    this.state = NEUTRAL;
-    return;
-  }
-  if (endThings.test(char)) {
-    this.afterItem(char);
-    return;
-  }
-  throw new Error('havn\'t handled "' +char + '" in keyword yet, index ' + this.place);
-};
-Parser.prototype.neutral = function(char) {
-  if (latin.test(char)) {
-    this.word = char;
-    this.state = KEYWORD;
-    return;
-  }
-  if (char === '"') {
-    this.word = '';
-    this.state = QUOTED;
-    return;
-  }
-  if (digets.test(char)) {
-    this.word = char;
-    this.state = NUMBER;
-    return;
-  }
-  if (endThings.test(char)) {
-    this.afterItem(char);
-    return;
-  }
-  throw new Error('havn\'t handled "' +char + '" in neutral yet, index ' + this.place);
-};
-Parser.prototype.output = function() {
-  while (this.place < this.text.length) {
-    this.readCharicter();
-  }
-  if (this.state === ENDED) {
-    return this.root;
-  }
-  throw new Error('unable to parse string "' +this.text + '". State is ' + this.state);
-};
-
-function parseString(txt) {
-  var parser = new Parser(txt);
-  return parser.output();
-}
-
-function mapit(obj, key, value) {
-  if (Array.isArray(key)) {
-    value.unshift(key);
-    key = null;
-  }
-  var thing = key ? {} : obj;
-
-  var out = value.reduce(function(newObj, item) {
-    sExpr(item, newObj);
-    return newObj
-  }, thing);
-  if (key) {
-    obj[key] = out;
-  }
-}
-
-function sExpr(v, obj) {
-  if (!Array.isArray(v)) {
-    obj[v] = true;
-    return;
-  }
-  var key = v.shift();
-  if (key === 'PARAMETER') {
-    key = v.shift();
-  }
-  if (v.length === 1) {
-    if (Array.isArray(v[0])) {
-      obj[key] = {};
-      sExpr(v[0], obj[key]);
-      return;
-    }
-    obj[key] = v[0];
-    return;
-  }
-  if (!v.length) {
-    obj[key] = true;
-    return;
-  }
-  if (key === 'TOWGS84') {
-    obj[key] = v;
-    return;
-  }
-  if (key === 'AXIS') {
-    if (!(key in obj)) {
-      obj[key] = [];
-    }
-    obj[key].push(v);
-    return;
-  }
-  if (!Array.isArray(key)) {
-    obj[key] = {};
-  }
-
-  var i;
-  switch (key) {
-    case 'UNIT':
-    case 'PRIMEM':
-    case 'VERT_DATUM':
-      obj[key] = {
-        name: v[0].toLowerCase(),
-        convert: v[1]
-      };
-      if (v.length === 3) {
-        sExpr(v[2], obj[key]);
-      }
-      return;
-    case 'SPHEROID':
-    case 'ELLIPSOID':
-      obj[key] = {
-        name: v[0],
-        a: v[1],
-        rf: v[2]
-      };
-      if (v.length === 4) {
-        sExpr(v[3], obj[key]);
-      }
-      return;
-    case 'PROJECTEDCRS':
-    case 'PROJCRS':
-    case 'GEOGCS':
-    case 'GEOCCS':
-    case 'PROJCS':
-    case 'LOCAL_CS':
-    case 'GEODCRS':
-    case 'GEODETICCRS':
-    case 'GEODETICDATUM':
-    case 'EDATUM':
-    case 'ENGINEERINGDATUM':
-    case 'VERT_CS':
-    case 'VERTCRS':
-    case 'VERTICALCRS':
-    case 'COMPD_CS':
-    case 'COMPOUNDCRS':
-    case 'ENGINEERINGCRS':
-    case 'ENGCRS':
-    case 'FITTED_CS':
-    case 'LOCAL_DATUM':
-    case 'DATUM':
-      v[0] = ['name', v[0]];
-      mapit(obj, key, v);
-      return;
-    default:
-      i = -1;
-      while (++i < v.length) {
-        if (!Array.isArray(v[i])) {
-          return sExpr(v, obj[key]);
-        }
-      }
-      return mapit(obj, key, v);
-  }
-}
-
-var D2R = 0.01745329251994329577;
-
-
-
-function rename(obj, params) {
-  var outName = params[0];
-  var inName = params[1];
-  if (!(outName in obj) && (inName in obj)) {
-    obj[outName] = obj[inName];
-    if (params.length === 3) {
-      obj[outName] = params[2](obj[outName]);
-    }
-  }
-}
-
-function d2r(input) {
-  return input * D2R;
-}
-
-function cleanWKT(wkt) {
-  if (wkt.type === 'GEOGCS') {
-    wkt.projName = 'longlat';
-  } else if (wkt.type === 'LOCAL_CS') {
-    wkt.projName = 'identity';
-    wkt.local = true;
-  } else {
-    if (typeof wkt.PROJECTION === 'object') {
-      wkt.projName = Object.keys(wkt.PROJECTION)[0];
-    } else {
-      wkt.projName = wkt.PROJECTION;
-    }
-  }
-  if (wkt.AXIS) {
-    var axisOrder = '';
-    for (var i = 0, ii = wkt.AXIS.length; i < ii; ++i) {
-      var axis = [wkt.AXIS[i][0].toLowerCase(), wkt.AXIS[i][1].toLowerCase()];
-      if (axis[0].indexOf('north') !== -1 || ((axis[0] === 'y' || axis[0] === 'lat') && axis[1] === 'north')) {
-        axisOrder += 'n';
-      } else if (axis[0].indexOf('south') !== -1 || ((axis[0] === 'y' || axis[0] === 'lat') && axis[1] === 'south')) {
-        axisOrder += 's';
-      } else if (axis[0].indexOf('east') !== -1 || ((axis[0] === 'x' || axis[0] === 'lon') && axis[1] === 'east')) {
-        axisOrder += 'e';
-      } else if (axis[0].indexOf('west') !== -1 || ((axis[0] === 'x' || axis[0] === 'lon') && axis[1] === 'west')) {
-        axisOrder += 'w';
-      }
-    }
-    if (axisOrder.length === 2) {
-      axisOrder += 'u';
-    }
-    if (axisOrder.length === 3) {
-      wkt.axis = axisOrder;
-    }
-  }
-  if (wkt.UNIT) {
-    wkt.units = wkt.UNIT.name.toLowerCase();
-    if (wkt.units === 'metre') {
-      wkt.units = 'meter';
-    }
-    if (wkt.UNIT.convert) {
-      if (wkt.type === 'GEOGCS') {
-        if (wkt.DATUM && wkt.DATUM.SPHEROID) {
-          wkt.to_meter = wkt.UNIT.convert*wkt.DATUM.SPHEROID.a;
-        }
-      } else {
-        wkt.to_meter = wkt.UNIT.convert;
-      }
-    }
-  }
-  var geogcs = wkt.GEOGCS;
-  if (wkt.type === 'GEOGCS') {
-    geogcs = wkt;
-  }
-  if (geogcs) {
-    //if(wkt.GEOGCS.PRIMEM&&wkt.GEOGCS.PRIMEM.convert){
-    //  wkt.from_greenwich=wkt.GEOGCS.PRIMEM.convert*D2R;
-    //}
-    if (geogcs.DATUM) {
-      wkt.datumCode = geogcs.DATUM.name.toLowerCase();
-    } else {
-      wkt.datumCode = geogcs.name.toLowerCase();
-    }
-    if (wkt.datumCode.slice(0, 2) === 'd_') {
-      wkt.datumCode = wkt.datumCode.slice(2);
-    }
-    if (wkt.datumCode === 'new_zealand_geodetic_datum_1949' || wkt.datumCode === 'new_zealand_1949') {
-      wkt.datumCode = 'nzgd49';
-    }
-    if (wkt.datumCode === 'wgs_1984' || wkt.datumCode === 'world_geodetic_system_1984') {
-      if (wkt.PROJECTION === 'Mercator_Auxiliary_Sphere') {
-        wkt.sphere = true;
-      }
-      wkt.datumCode = 'wgs84';
-    }
-    if (wkt.datumCode.slice(-6) === '_ferro') {
-      wkt.datumCode = wkt.datumCode.slice(0, - 6);
-    }
-    if (wkt.datumCode.slice(-8) === '_jakarta') {
-      wkt.datumCode = wkt.datumCode.slice(0, - 8);
-    }
-    if (~wkt.datumCode.indexOf('belge')) {
-      wkt.datumCode = 'rnb72';
-    }
-    if (geogcs.DATUM && geogcs.DATUM.SPHEROID) {
-      wkt.ellps = geogcs.DATUM.SPHEROID.name.replace('_19', '').replace(/[Cc]larke\_18/, 'clrk');
-      if (wkt.ellps.toLowerCase().slice(0, 13) === 'international') {
-        wkt.ellps = 'intl';
-      }
-
-      wkt.a = geogcs.DATUM.SPHEROID.a;
-      wkt.rf = parseFloat(geogcs.DATUM.SPHEROID.rf, 10);
-    }
-
-    if (geogcs.DATUM && geogcs.DATUM.TOWGS84) {
-      wkt.datum_params = geogcs.DATUM.TOWGS84;
-    }
-    if (~wkt.datumCode.indexOf('osgb_1936')) {
-      wkt.datumCode = 'osgb36';
-    }
-    if (~wkt.datumCode.indexOf('osni_1952')) {
-      wkt.datumCode = 'osni52';
-    }
-    if (~wkt.datumCode.indexOf('tm65')
-      || ~wkt.datumCode.indexOf('geodetic_datum_of_1965')) {
-      wkt.datumCode = 'ire65';
-    }
-    if (wkt.datumCode === 'ch1903+') {
-      wkt.datumCode = 'ch1903';
-    }
-    if (~wkt.datumCode.indexOf('israel')) {
-      wkt.datumCode = 'isr93';
-    }
-  }
-  if (wkt.b && !isFinite(wkt.b)) {
-    wkt.b = wkt.a;
-  }
-
-  function toMeter(input) {
-    var ratio = wkt.to_meter || 1;
-    return input * ratio;
-  }
-  var renamer = function(a) {
-    return rename(wkt, a);
-  };
-  var list = [
-    ['standard_parallel_1', 'Standard_Parallel_1'],
-    ['standard_parallel_1', 'Latitude of 1st standard parallel'],
-    ['standard_parallel_2', 'Standard_Parallel_2'],
-    ['standard_parallel_2', 'Latitude of 2nd standard parallel'],
-    ['false_easting', 'False_Easting'],
-    ['false_easting', 'False easting'],
-    ['false-easting', 'Easting at false origin'],
-    ['false_northing', 'False_Northing'],
-    ['false_northing', 'False northing'],
-    ['false_northing', 'Northing at false origin'],
-    ['central_meridian', 'Central_Meridian'],
-    ['central_meridian', 'Longitude of natural origin'],
-    ['central_meridian', 'Longitude of false origin'],
-    ['latitude_of_origin', 'Latitude_Of_Origin'],
-    ['latitude_of_origin', 'Central_Parallel'],
-    ['latitude_of_origin', 'Latitude of natural origin'],
-    ['latitude_of_origin', 'Latitude of false origin'],
-    ['scale_factor', 'Scale_Factor'],
-    ['k0', 'scale_factor'],
-    ['latitude_of_center', 'Latitude_Of_Center'],
-    ['latitude_of_center', 'Latitude_of_center'],
-    ['lat0', 'latitude_of_center', d2r],
-    ['longitude_of_center', 'Longitude_Of_Center'],
-    ['longitude_of_center', 'Longitude_of_center'],
-    ['longc', 'longitude_of_center', d2r],
-    ['x0', 'false_easting', toMeter],
-    ['y0', 'false_northing', toMeter],
-    ['long0', 'central_meridian', d2r],
-    ['lat0', 'latitude_of_origin', d2r],
-    ['lat0', 'standard_parallel_1', d2r],
-    ['lat1', 'standard_parallel_1', d2r],
-    ['lat2', 'standard_parallel_2', d2r],
-    ['azimuth', 'Azimuth'],
-    ['alpha', 'azimuth', d2r],
-    ['srsCode', 'name']
-  ];
-  list.forEach(renamer);
-  if (!wkt.long0 && wkt.longc && (wkt.projName === 'Albers_Conic_Equal_Area' || wkt.projName === 'Lambert_Azimuthal_Equal_Area')) {
-    wkt.long0 = wkt.longc;
-  }
-  if (!wkt.lat_ts && wkt.lat1 && (wkt.projName === 'Stereographic_South_Pole' || wkt.projName === 'Polar Stereographic (variant B)')) {
-    wkt.lat0 = d2r(wkt.lat1 > 0 ? 90 : -90);
-    wkt.lat_ts = wkt.lat1;
-  } else if (!wkt.lat_ts && wkt.lat0 && wkt.projName === 'Polar_Stereographic') {
-    wkt.lat_ts = wkt.lat0;
-    wkt.lat0 = d2r(wkt.lat0 > 0 ? 90 : -90);
-  }
-}
-function index(wkt) {
-  var lisp = parseString(wkt);
-  var type = lisp.shift();
-  var name = lisp.shift();
-  lisp.unshift(['name', name]);
-  lisp.unshift(['type', type]);
-  var obj = {};
-  sExpr(lisp, obj);
-  cleanWKT(obj);
-  return obj;
-}
-
-module.exports = index;