diff --git a/.eslintrc.json b/.eslintrc.json
index 17f167d..240b092 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -1,7 +1,7 @@
 {
-  "env": { "browser": true, "commonjs": true },
+  "env": { "browser": true },
   "extends": "eslint:recommended",
-  "parserOptions": { "ecmaVersion": 5 },
+  "parserOptions": { "ecmaVersion": 6, "sourceType": "module" },
   "rules": {
     "block-scoped-var": "error",
     "consistent-return": "error",
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 43f9f20..e16f413 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,6 +16,7 @@ jobs:
       - name: Set up PureScript toolchain
         uses: purescript-contrib/setup-purescript@main
         with:
+          purescript: "unstable"
           purs-tidy: "latest"
 
       - name: Cache PureScript dependencies
@@ -49,8 +50,17 @@ jobs:
       - name: Build the project
         run: npm run build
 
-      - name: Run tests
-        run: npm run test
+#      - name: Run tests
+#        run: npm run test
 
       - name: Check formatting
         run: purs-tidy check src test
+
+      - name: Verify Bower & Pulp
+        run: |
+          npm install bower pulp@16.0.0-0
+          npx bower install
+          npx pulp build -- --censor-lib --strict
+          if [ -d "test" ]; then
+            npx pulp test
+          fi
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d3b2ff0..362269d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ Notable changes to this project are documented in this file. The format is based
 ## [Unreleased]
 
 Breaking changes:
+- Migrate FFI to ES modules (#28 by @JordanMartinez)
 
 New features:
 
diff --git a/bower.json b/bower.json
index c055e0b..d8b9c9b 100644
--- a/bower.json
+++ b/bower.json
@@ -16,11 +16,11 @@
     "url": "https://github.com/purescript-contrib/purescript-react-dom.git"
   },
   "dependencies": {
-    "purescript-effect": "^3.0.0",
-    "purescript-react": "^9.0.0",
-    "purescript-web-dom": "^5.0.0"
+    "purescript-effect": "master",
+    "purescript-react": "main",
+    "purescript-web-dom": "master"
   },
   "devDependencies": {
-    "purescript-console": "^5.0.0"
+    "purescript-console": "master"
   }
 }
diff --git a/package.json b/package.json
index d913a47..2382bdb 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   },
   "devDependencies": {
     "eslint": "^7.6.0",
-    "purescript-psa": "^0.8.0"
+    "purescript-psa": "^0.8.2"
   },
   "peerDependencies": {
     "react-dom": "^16.0.0"
diff --git a/packages.dhall b/packages.dhall
index 7a6905b..582d6d3 100644
--- a/packages.dhall
+++ b/packages.dhall
@@ -1,4 +1,4 @@
 let upstream =
-      https://github.com/purescript/package-sets/releases/download/psc-0.14.3-20210722/packages.dhall sha256:1ceb43aa59436bf5601bac45f6f3781c4e1f0e4c2b8458105b018e5ed8c30f8c
+      https://raw.githubusercontent.com/purescript/package-sets/prepare-0.15/src/packages.dhall
 
 in  upstream
diff --git a/spago.dhall b/spago.dhall
index 5f90df3..1294aae 100644
--- a/spago.dhall
+++ b/spago.dhall
@@ -6,7 +6,6 @@
   , "maybe"
   , "nullable"
   , "prelude"
-  , "psci-support"
   , "react"
   , "web-dom"
   ]
diff --git a/src/ReactDOM.js b/src/ReactDOM.js
index 1bd7f0a..87b77bc 100644
--- a/src/ReactDOM.js
+++ b/src/ReactDOM.js
@@ -1,18 +1,15 @@
-"use strict";
+import ReactDOM from "react-dom";
+import ReactDOMServer from "react-dom/server";
 
-var ReactDOM = require("react-dom");
-var ReactDOMServer = require("react-dom/server");
-
-exports.renderImpl = function (element, container) {
+export function renderImpl(element, container) {
   return ReactDOM.render(element, container);
-};
+}
 
-exports.hydrateImpl = function (element, container) {
+export function hydrateImpl(element, container) {
   return ReactDOM.hydrate(element, container);
-};
-
-exports.unmountComponentAtNodeImpl = ReactDOM.unmountComponentAtNode;
-exports.findDOMNodeImpl = ReactDOM.findDOMNode;
+}
 
-exports.renderToStringImpl = ReactDOMServer.renderToString;
-exports.renderToStaticMarkupImpl = ReactDOMServer.renderToStaticMarkup;
+export const unmountComponentAtNodeImpl = ReactDOM.unmountComponentAtNode;
+export const findDOMNodeImpl = ReactDOM.findDOMNode;
+export const renderToStringImpl = ReactDOMServer.renderToString;
+export const renderToStaticMarkupImpl = ReactDOMServer.renderToStaticMarkup;