diff --git a/README.md b/README.md
index 30c14c9..4f8bd8d 100644
--- a/README.md
+++ b/README.md
@@ -21,8 +21,8 @@ Example
 
 ```html
 <div id="test"></div>
-<script type="text/javascript" src="renderjson.js"></script>
-<script>
+<script type="module">
+    import renderjson from "./renderjson.mjs"
     document.getElementById("test").appendChild(
         renderjson({ hello: [1,2,3,4], there: { a:1, b:2, c:["hello", null] } })
     );
diff --git a/package.json b/package.json
index 5f2a8cd..3ad71a6 100644
--- a/package.json
+++ b/package.json
@@ -2,11 +2,12 @@
   "name": "renderjson",
   "version": "1.4.0",
   "description": "Render JSON into collapsible HTML",
-  "main": "renderjson.js",
+  "exports": "./renderjson.mjs",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/caldwell/renderjson.git"
   },
+  "type": "module",
   "keywords": [
     "json",
     "html"
diff --git a/renderjson.js b/renderjson.mjs
similarity index 98%
rename from renderjson.js
rename to renderjson.mjs
index 9d41d2d..5bdefb2 100644
--- a/renderjson.js
+++ b/renderjson.mjs
@@ -61,7 +61,7 @@
 //     .object.syntax ("{", "}")
 //     .array.syntax  ("[", "]")
 
-var module, window, define, renderjson=(function() {
+export default (function() {
     var themetext = function(/* [class, text]+ */) {
         var spans = [];
         while (arguments.length)
@@ -211,6 +211,3 @@ var module, window, define, renderjson=(function() {
     renderjson.set_collapse_msg(function(len) { return len + " item" + (len==1 ? "" : "s") })
     return renderjson;
 })();
-
-if (define) define({renderjson:renderjson})
-else (module||{}).exports = (window||{}).renderjson = renderjson;
diff --git a/test.html b/test.html
index 8521fb1..7c0f572 100644
--- a/test.html
+++ b/test.html
@@ -21,8 +21,8 @@ <h1></h1>
 
     <div id="dest"></div>
 
-    <script type="text/javascript" src="renderjson.js"></script>
-    <script>
+    <script type="module">
+import renderjson from "./renderjson.mjs"
 document.getElementById("dest").appendChild(
   renderjson//.set_show_by_default(true)
             //.set_show_to_level(2)