diff --git a/package.json b/package.json
index 7ef903f..986228b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fimfic2epub",
-  "version": "1.7.21",
+  "version": "1.7.22",
   "description": "Tool to generate improved EPUB ebooks from Fimfiction stories",
   "author": "djazz",
   "license": "MIT",
diff --git a/src/FimFic2Epub.js b/src/FimFic2Epub.js
index 7ec6517..83d22fd 100644
--- a/src/FimFic2Epub.js
+++ b/src/FimFic2Epub.js
@@ -804,4 +804,4 @@ class FimFic2Epub extends EventEmitter {
   }
 }
 
-module.exports = FimFic2Epub
+export default FimFic2Epub
diff --git a/src/cli.js b/src/cli.js
index b6ae2f3..443d7cf 100755
--- a/src/cli.js
+++ b/src/cli.js
@@ -32,7 +32,7 @@ if (outputStdout) {
 // use a mock DOM so we can run mithril on the server
 require('mithril/test-utils/browserMock')(global)
 
-const FimFic2Epub = require('./FimFic2Epub')
+const FimFic2Epub = require('./FimFic2Epub').default
 const fs = require('fs')
 const path = require('path')