diff --git a/openlayers/CHANGELOG.md b/openlayers/CHANGELOG.md
index ff79212..fe9cbb4 100644
--- a/openlayers/CHANGELOG.md
+++ b/openlayers/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 2.0.1
+* Fix IIFE build - fflate needs browser build instead of node one
+
+## 2.0.0
+* Update to pmtiles.js v4
+
 ## 1.0.0
 
 * Port code to TypeScript.
diff --git a/openlayers/examples/raster.html b/openlayers/examples/raster.html
index 16782bc..76f9865 100644
--- a/openlayers/examples/raster.html
+++ b/openlayers/examples/raster.html
@@ -4,7 +4,7 @@
         <meta charset="utf-8"/>
         <script src="https://cdn.jsdelivr.net/npm/ol@v9.0.0/dist/ol.js"></script>
         <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@v9.0.0/ol.css">
-        <script src="https://unpkg.com/ol-pmtiles@2.0.0/dist/olpmtiles.js"></script>
+        <script src="https://unpkg.com/ol-pmtiles@2.0.1/dist/olpmtiles.js"></script>
         <style>
             body, #map {
                 height:100vh;
diff --git a/openlayers/examples/vector.html b/openlayers/examples/vector.html
index afa0957..777e1eb 100644
--- a/openlayers/examples/vector.html
+++ b/openlayers/examples/vector.html
@@ -4,7 +4,7 @@
         <meta charset="utf-8"/>
         <script src="https://cdn.jsdelivr.net/npm/ol@v9.0.0/dist/ol.js"></script>
         <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@v9.0.0/ol.css">
-        <script src="https://unpkg.com/ol-pmtiles@2.0.0/dist/olpmtiles.js"></script>
+        <script src="https://unpkg.com/ol-pmtiles@2.0.1/dist/olpmtiles.js"></script>
         <style>
             body, #map {
                 height:100vh;
diff --git a/openlayers/package-lock.json b/openlayers/package-lock.json
index 1833979..e98fca2 100644
--- a/openlayers/package-lock.json
+++ b/openlayers/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ol-pmtiles",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "ol-pmtiles",
-      "version": "2.0.0",
+      "version": "2.0.1",
       "license": "BSD-3-Clause",
       "dependencies": {
         "pmtiles": "^4.2.1"
diff --git a/openlayers/package.json b/openlayers/package.json
index 7dec87b..da5f2cc 100644
--- a/openlayers/package.json
+++ b/openlayers/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ol-pmtiles",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "PMTiles sources for OpenLayers",
   "type": "module",
   "main": "dist/cjs/index.cjs",
diff --git a/openlayers/tsup.config.ts b/openlayers/tsup.config.ts
index 12c38eb..c6524ae 100644
--- a/openlayers/tsup.config.ts
+++ b/openlayers/tsup.config.ts
@@ -29,6 +29,9 @@ export default [
   }),
   defineConfig({
     ...baseOptions,
+    esbuildOptions: (options) => {
+      options.platform = "browser";
+    },
     outDir: "dist",
     format: "iife",
     globalName: "olpmtiles",