diff --git a/.gitignore b/.gitignore
index 4d159c2..5ba39cf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,5 @@
 /output/
 /.psci*
 /src/.webpack.js
+/.spago/
+/.psc-ide-port
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..ccfdd1e
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,14 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+Features:
+- Update to v0.15.0 and support es modules
+
+Breaking changes:
+- `discover` now needs `MonadAff` constraint instead of `MonadEffect` due to dynamic imports returning promises
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..73de491
--- /dev/null
+++ b/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "purescript-spec-discovery",
+  "version": "1.0.0",
+  "description": "purescript-spec-discovery is an extension to [purescript-spec](https://github.com/purescript-spec/purescript-spec) that finds specs automatically, given a regular expression pattern.",
+  "main": "index.js",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/working-group-purescript-es/purescript-spec-discovery.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/working-group-purescript-es/purescript-spec-discovery/issues"
+  },
+  "homepage": "https://github.com/working-group-purescript-es/purescript-spec-discovery#readme",
+  "type": "module"
+}
diff --git a/packages.dhall b/packages.dhall
new file mode 100644
index 0000000..e51258b
--- /dev/null
+++ b/packages.dhall
@@ -0,0 +1,24 @@
+let upstream =
+      https://raw.githubusercontent.com/purescript/package-sets/prepare-0.15/src/packages.dhall
+        sha256:5f32c078b014909642302b328bd9bebcdcedc301956a709b302f19521680a0aa
+
+in  upstream
+  with metadata.version = "v0.15.0-alpha-02"
+  with spec =
+    { repo = "https://github.com/purescript-spec/purescript-spec.git"
+    , version = "master"
+    , dependencies =
+      [ "aff"
+      , "ansi"
+      , "avar"
+      , "console"
+      , "exceptions"
+      , "foldable-traversable"
+      , "fork"
+      , "now"
+      , "pipes"
+      , "prelude"
+      , "strings"
+      , "transformers"
+      ]
+    }
diff --git a/spago.dhall b/spago.dhall
new file mode 100644
index 0000000..1c6fe89
--- /dev/null
+++ b/spago.dhall
@@ -0,0 +1,27 @@
+{-
+Welcome to a Spago project!
+You can edit this file as you like.
+
+Need help? See the following resources:
+- Spago documentation: https://github.com/purescript/spago
+- Dhall language tour: https://docs.dhall-lang.org/tutorials/Language-Tour.html
+
+When creating a new Spago project, you can use
+`spago init --no-comments` or `spago init -C`
+to generate this file without the comments in this block.
+-}
+{ name = "spec-discovery"
+, dependencies =
+  [ "aff"
+  , "aff-promise"
+  , "arrays"
+  , "console"
+  , "effect"
+  , "foldable-traversable"
+  , "node-fs"
+  , "prelude"
+  , "spec"
+  ]
+, packages = ./packages.dhall
+, sources = [ "src/**/*.purs", "test/**/*.purs" ]
+}
diff --git a/src/Test/Spec/Discovery.js b/src/Test/Spec/Discovery.js
index 58aa212..cbd6642 100644
--- a/src/Test/Spec/Discovery.js
+++ b/src/Test/Spec/Discovery.js
@@ -1,24 +1,30 @@
-'use strict';
+import path from "path"
+import fs from 'fs';
+import { fileURLToPath } from "url"
 
-if (typeof require !== 'function') {
-  throw new Error('Sorry, purescript-spec-discovery only supports NodeJS environments!');
-}
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(__filename)
 
-var fs = require('fs');
-var path = require('path');
+if (import.meta.url === `file://${process.argv[1]}`) {
+    throw new Error('Sorry, purescript-spec-discovery only supports NodeJS environments!');
+}
 
 function getMatchingModules(pattern) {
   var directories = fs.readdirSync(path.join(__dirname, '..'));
-  return directories.filter(function (directory) {
+  const modulePromises = directories.filter(function (directory) {
     return (new RegExp(pattern).test(directory));
   }).map(function (name) {
-    var module = require(path.join(__dirname, '..', name));
-    return (module && typeof module.spec !== 'undefined') ? module.spec : null;
-  }).filter(function (x) { return x; });
+    var modulePromise = import(path.join(__dirname, '..', name, 'index.js'));
+    return modulePromise.then( module => {
+      return (module && typeof module.spec !== 'undefined') ? module.spec : null;
+    })
+  })
+  const modules = Promise.all(modulePromises)
+  return modules.then(ms => ms.filter(function (x) { return x; }));
 }
 
-exports.getSpecs = function (pattern) {
+export function getSpecs(pattern) {
   return function () {
     return getMatchingModules(pattern);
   };
-};
+}
diff --git a/src/Test/Spec/Discovery.purs b/src/Test/Spec/Discovery.purs
index db4182d..75ffba2 100644
--- a/src/Test/Spec/Discovery.purs
+++ b/src/Test/Spec/Discovery.purs
@@ -2,14 +2,20 @@ module Test.Spec.Discovery (discover) where
 
 import Prelude
 
+import Control.Promise (Promise)
+import Control.Promise as Promise
 import Data.Traversable (sequence_)
 import Effect (Effect)
-import Effect.Class (class MonadEffect, liftEffect)
+import Effect.Aff.Class (class MonadAff, liftAff)
 import Test.Spec (Spec)
 
-foreign import getSpecs :: String
-                        -> Effect (Array (Spec Unit))
+foreign import getSpecs
+  :: String
+  -> Effect (Promise (Array (Spec Unit)))
 
-discover :: forall m. MonadEffect m => String
-         -> m (Spec Unit)
-discover pattern = getSpecs pattern >>= (pure <<< sequence_) # liftEffect
+discover
+  :: forall m
+   . MonadAff m
+  => String
+  -> m (Spec Unit)
+discover pattern = getSpecs pattern # Promise.toAffE >>= (pure <<< sequence_) # liftAff
diff --git a/test/Main.purs b/test/Main.purs
index c8c57fb..4f6ab6b 100644
--- a/test/Main.purs
+++ b/test/Main.purs
@@ -9,4 +9,4 @@ import Test.Spec.Reporter.Console (consoleReporter)
 import Test.Spec.Runner (runSpec)
 
 main :: Effect Unit
-main = discover "Test\\.Spec\\.Discovery.*Spec" >>= runSpec [consoleReporter] >>> launchAff_
+main = launchAff_ $ discover "Test\\.Spec\\.Discovery.*Spec" >>= runSpec [consoleReporter]