diff --git a/rollup.config.js b/rollup.config.js
index 740070c..7bb98b1 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -57,7 +57,7 @@ const babelExternal = [/@babel\/runtime/];
 
 export default [
   {
-    input: "src/JsonURL.js",
+    input: "src/index.js",
     output: [
       {
         name: pkg.moduleName,
@@ -68,7 +68,7 @@ export default [
     plugins: [resolve(), commonjs(), babel(babelBundle)],
   },
   {
-    input: "src/JsonURL.js",
+    input: "src/index.js",
     output: [
       {
         name: pkg.moduleName,
@@ -80,7 +80,7 @@ export default [
     plugins: [resolve(), commonjs(), babel(babelBundle), terser()],
   },
   {
-    input: "src/JsonURL.js",
+    input: "src/index.js",
     output: [
       {
         name: pkg.moduleName,
diff --git a/src/JsonURL.js b/src/JsonURL.js
index ffe9da8..af38129 100644
--- a/src/JsonURL.js
+++ b/src/JsonURL.js
@@ -1792,5 +1792,3 @@ export class JsonURL {
     return value.toJsonURLText(options, 0);
   }
 }
-
-export { JsonURL as default };
diff --git a/src/index.js b/src/index.js
new file mode 100644
index 0000000..f9e961c
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1,30 @@
+/*
+  MIT License
+
+  Copyright (c) 2020 David MacCormack
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+*/
+import { JsonURL } from "./JsonURL.js";
+
+//
+// this shim simply exports a default. This makes rollup output a function
+// rather than an object.
+//
+export default JsonURL;
diff --git a/test/errors.test.js b/test/errors.test.js
index 4128ebb..44231c0 100644
--- a/test/errors.test.js
+++ b/test/errors.test.js
@@ -22,7 +22,7 @@
   SOFTWARE.
 */
 
-import JsonURL from "../src/JsonURL.js";
+import { JsonURL } from "../src/JsonURL.js";
 import { JsonURLParseOptions } from "../src/JsonURLParseOptions.js";
 
 test.each([
diff --git a/test/parse.test.js b/test/parse.test.js
index 2ab510b..f6c07e6 100644
--- a/test/parse.test.js
+++ b/test/parse.test.js
@@ -22,7 +22,7 @@
   SOFTWARE.
 */
 
-import JsonURL from "../src/JsonURL.js";
+import { JsonURL } from "../src/JsonURL.js";
 
 const u = new JsonURL();
 
diff --git a/test/parseImplied.test.js b/test/parseImplied.test.js
index 88f2fbf..e0b3913 100644
--- a/test/parseImplied.test.js
+++ b/test/parseImplied.test.js
@@ -22,7 +22,7 @@
   SOFTWARE.
 */
 
-import JsonURL from "../src/JsonURL.js";
+import { JsonURL } from "../src/JsonURL.js";
 
 const u = new JsonURL();
 
diff --git a/test/parseImpliedStringLiterals.test.js b/test/parseImpliedStringLiterals.test.js
index 2fee6da..537fe85 100644
--- a/test/parseImpliedStringLiterals.test.js
+++ b/test/parseImpliedStringLiterals.test.js
@@ -22,7 +22,7 @@
   SOFTWARE.
 */
 
-import JsonURL from "../src/JsonURL.js";
+import { JsonURL } from "../src/JsonURL.js";
 
 const u = new JsonURL();
 
diff --git a/test/parseLiteral.test.js b/test/parseLiteral.test.js
index 8482d53..ea9d073 100644
--- a/test/parseLiteral.test.js
+++ b/test/parseLiteral.test.js
@@ -22,7 +22,7 @@
   SOFTWARE.
 */
 
-import JsonURL from "../src/JsonURL.js";
+import { JsonURL } from "../src/JsonURL.js";
 
 function encodedString(s) {
   return s
diff --git a/test/parseNoComposite.test.js b/test/parseNoComposite.test.js
index e077bdf..3d03d2c 100644
--- a/test/parseNoComposite.test.js
+++ b/test/parseNoComposite.test.js
@@ -22,7 +22,7 @@
   SOFTWARE.
 */
 
-import JsonURL from "../src/JsonURL.js";
+import { JsonURL } from "../src/JsonURL.js";
 
 const u = new JsonURL();
 
diff --git a/test/parseWwwFormUrlEncoded.test.js b/test/parseWwwFormUrlEncoded.test.js
index c83d5c2..8bc5694 100644
--- a/test/parseWwwFormUrlEncoded.test.js
+++ b/test/parseWwwFormUrlEncoded.test.js
@@ -22,7 +22,7 @@
   SOFTWARE.
 */
 
-import JsonURL from "../src/JsonURL.js";
+import { JsonURL } from "../src/JsonURL.js";
 
 function resetOptions(options, implied = true) {
   if (options.impliedArray) {
diff --git a/test/stringify.test.js b/test/stringify.test.js
index 7b6aaa1..430bb96 100644
--- a/test/stringify.test.js
+++ b/test/stringify.test.js
@@ -22,7 +22,7 @@
   SOFTWARE.
 */
 
-import JsonURL from "../src/JsonURL.js";
+import { JsonURL } from "../src/JsonURL.js";
 
 //
 // JsonURL.stringify tests