diff --git a/.gitignore b/.gitignore
index f7c03c8..569985b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,4 +10,3 @@ reactR.Rcheck
 reactR_*.tar.gz
 *.swp
 .DS_Store
-inst/www/react-tools/react-tools.js
diff --git a/DESCRIPTION b/DESCRIPTION
index b703989..6446fe5 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: reactR
 Type: Package
 Title: React Helpers
-Version: 0.6.0
-Date: 2024-06-26
+Version: 0.6.1
+Date: 2024-09-09
 Authors@R: c(
       person(
         "Facebook", "Inc"
@@ -46,5 +46,5 @@ Suggests:
     knitr,
     usethis,
     jsonlite
-RoxygenNote: 7.3.1
+RoxygenNote: 7.3.2
 VignetteBuilder: knitr
diff --git a/NEWS.md b/NEWS.md
index 8490e82..f87f910 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,7 @@
+# reactR 0.6.1
+
+* Fix issue where the `react-tools.umd.cjs` script could be blocked by the browser in some cases, such as apps deployed on shinyapps.io [#86](https://github.com/react-R/reactR/issues/86)
+
 # reactR 0.6.0
 
 * retain `list` in `reactR::component` classes [#82](https://github.com/react-R/reactR/issues/82)
diff --git a/R/dependencies.R b/R/dependencies.R
index 4bfe3b6..cfc0397 100644
--- a/R/dependencies.R
+++ b/R/dependencies.R
@@ -82,7 +82,7 @@ html_dependency_reacttools <- function(){
     src = "www/react-tools",
     version = "2.0.0",
     package = "reactR",
-    script = c("react-tools.umd.cjs")
+    script = c("react-tools.js")
   )
 }
 
diff --git a/inst/www/react-tools/react-tools.js b/inst/www/react-tools/react-tools.js
new file mode 100644
index 0000000..87dc5ba
--- /dev/null
+++ b/inst/www/react-tools/react-tools.js
@@ -0,0 +1 @@
+(function(s,u){typeof exports=="object"&&typeof module<"u"?u(exports):typeof define=="function"&&define.amd?define(["exports"],u):(s=typeof globalThis<"u"?globalThis:s||self,u(s.reactR={}))})(this,function(s){"use strict";function u(n,t){if(typeof t=="string")return t;if(t.name[0]===t.name[0].toUpperCase()&&!n.hasOwnProperty(t.name))throw new Error("Unknown component: "+t.name);for(let i in t.attribs)g(t.attribs[i])&&(t.attribs[i]=u(n,t.attribs[i]));for(var a=n.hasOwnProperty(t.name)?n[t.name]:t.name,r=[a,t.attribs],e=0;e<t.children.length;e++)r.push(u(n,t.children[e]));return React.createElement.apply(React,r)}const d={widthProperty:"width",heightProperty:"height",appendPx:!1,renderOnResize:!1};function y(n){var t={};for(var a in d)t[a]=d[a];for(var a in n){if(!d.hasOwnProperty(a))throw new Error("Unrecognized option: "+a);t[a]=n[a]}return t}function o(n,t){if(!t.appendPx)return n}function g(n){return typeof n=="object"&&n.hasOwnProperty("name")&&n.hasOwnProperty("attribs")&&n.hasOwnProperty("children")}function b(n,t,a,r){var e=y(r);window.HTMLWidgets.widget({name:n,type:t,factory:function(i,c,l){var p,P={},h=function(f){e.renderOnResize&&(typeof f.tag=="object"&&(f.tag.attribs[e.widthProperty]=o(c),f.tag.attribs[e.heightProperty]=o(l)),p=f),this.instance.component=ReactDOM.render(u(a,f.tag),i)};return{instance:P,renderValue:h,resize:function(f,V){e.renderOnResize&&(c=f,l=V,h(p))}}}})}function O(n,{configuration:t,value:a}){let r=!1;t!==void 0&&(this.setInputConfiguration(n,t),r=!0),a!==void 0&&(this.setInputValue(n,a),r=!0),r&&(this.getCallback(n)(),this.render(n))}const m={receiveMessage:O,type:!1,ratePolicy:null};function w(n,t,a,r){r=Object.assign({},m,r),Shiny.inputBindings.register(new class extends Shiny.InputBinding{find(e){return $(e).find(n)}getValue(e){return this.getInputValue(e)}setValue(e,i,c=!1){$(e).data("callback")!==void 0&&(this.setInputValue(e,i),this.getCallback(e)(c),this.render(e))}initialize(e){$(e).data("value",JSON.parse($(e).next().text())),$(e).data("configuration",JSON.parse($(e).next().next().text()))}subscribe(e,i){$(e).data("callback",i),this.render(e)}unsubscribe(e){ReactDOM.render(null,e)}receiveMessage(e,i){r.receiveMessage.call(this,e,i)}getType(e){if(typeof r.type=="function")return r.type.call(this,e);if(r.type===!1||typeof r.type=="string")return r.type;throw new Error("options.type must be false, a string, or a function")}getRatePolicy(){return r.ratePolicy}getInputValue(e){return $(e).data("value")}setInputValue(e,i){$(e).data("value",i)}getInputConfiguration(e){return $(e).data("configuration")}setInputConfiguration(e,i){$(e).data("configuration",i)}getCallback(e){return $(e).data("callback")}render(e){const i=React.createElement(a,{configuration:this.getInputConfiguration(e),value:this.getValue(e),setValue:this.setValue.bind(this,e),el:e});ReactDOM.render(i,e)}},t)}s.hydrate=u,s.reactShinyInput=w,s.reactWidget=b,Object.defineProperty(s,Symbol.toStringTag,{value:"Module"})});
diff --git a/inst/www/react-tools/react-tools.umd.cjs b/inst/www/react-tools/react-tools.umd.cjs
deleted file mode 100644
index 92b8d86..0000000
--- a/inst/www/react-tools/react-tools.umd.cjs
+++ /dev/null
@@ -1 +0,0 @@
-(function(s,u){typeof exports=="object"&&typeof module<"u"?u(exports):typeof define=="function"&&define.amd?define(["exports"],u):(s=typeof globalThis<"u"?globalThis:s||self,u(s.reactR={}))})(this,function(s){"use strict";function u(n,t){if(typeof t=="string")return t;if(t.name[0]===t.name[0].toUpperCase()&&!n.hasOwnProperty(t.name))throw new Error("Unknown component: "+t.name);for(let i in t.attribs)g(t.attribs[i])&&(t.attribs[i]=u(n,t.attribs[i]));for(var a=n.hasOwnProperty(t.name)?n[t.name]:t.name,r=[a,t.attribs],e=0;e<t.children.length;e++)r.push(u(n,t.children[e]));return React.createElement.apply(React,r)}const o={widthProperty:"width",heightProperty:"height",appendPx:!1,renderOnResize:!1};function y(n){var t={};for(var a in o)t[a]=o[a];for(var a in n){if(!o.hasOwnProperty(a))throw new Error("Unrecognized option: "+a);t[a]=n[a]}return t}function d(n,t){return t.appendPx?n+"px":n}function g(n){return typeof n=="object"&&n.hasOwnProperty("name")&&n.hasOwnProperty("attribs")&&n.hasOwnProperty("children")}function b(n,t,a,r){var e=y(r);window.HTMLWidgets.widget({name:n,type:t,factory:function(i,c,l){var p,P={},h=function(f){e.renderOnResize&&(typeof f.tag=="object"&&(f.tag.attribs[e.widthProperty]=d(c),f.tag.attribs[e.heightProperty]=d(l)),p=f),this.instance.component=ReactDOM.render(u(a,f.tag),i)};return{instance:P,renderValue:h,resize:function(f,V){e.renderOnResize&&(c=f,l=V,h(p))}}}})}function O(n,{configuration:t,value:a}){let r=!1;t!==void 0&&(this.setInputConfiguration(n,t),r=!0),a!==void 0&&(this.setInputValue(n,a),r=!0),r&&(this.getCallback(n)(),this.render(n))}const w={receiveMessage:O,type:!1,ratePolicy:null};function m(n,t,a,r){r=Object.assign({},w,r),Shiny.inputBindings.register(new class extends Shiny.InputBinding{find(e){return $(e).find(n)}getValue(e){return this.getInputValue(e)}setValue(e,i,c=!1){$(e).data("callback")!==void 0&&(this.setInputValue(e,i),this.getCallback(e)(c),this.render(e))}initialize(e){$(e).data("value",JSON.parse($(e).next().text())),$(e).data("configuration",JSON.parse($(e).next().next().text()))}subscribe(e,i){$(e).data("callback",i),this.render(e)}unsubscribe(e){ReactDOM.render(null,e)}receiveMessage(e,i){r.receiveMessage.call(this,e,i)}getType(e){if(typeof r.type=="function")return r.type.call(this,e);if(r.type===!1||typeof r.type=="string")return r.type;throw new Error("options.type must be false, a string, or a function")}getRatePolicy(){return r.ratePolicy}getInputValue(e){return $(e).data("value")}setInputValue(e,i){$(e).data("value",i)}getInputConfiguration(e){return $(e).data("configuration")}setInputConfiguration(e,i){$(e).data("configuration",i)}getCallback(e){return $(e).data("callback")}render(e){const i=React.createElement(a,{configuration:this.getInputConfiguration(e),value:this.getValue(e),setValue:this.setValue.bind(this,e),el:e});ReactDOM.render(i,e)}},t)}s.hydrate=u,s.reactShinyInput=m,s.reactWidget=b,Object.defineProperty(s,Symbol.toStringTag,{value:"Module"})});
diff --git a/package-lock.json b/package-lock.json
index 6e557ea..aa9fcf2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,397 @@
                 "vitest": "^1.2.1"
             }
         },
+        "node_modules/@esbuild/aix-ppc64": {
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+            "cpu": [
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+            ],
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+        },
+        "node_modules/@esbuild/android-arm": {
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+            ],
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+            "version": "5.4.3",
+            "resolved": "https://registry.npmjs.org/vite/-/vite-5.4.3.tgz",
+            "integrity": "sha512-IH+nl64eq9lJjFqU+/yrRnrHPVTlgy42/+IzbOdaFDVlyLgI/wDlf+FCobXLX1cT0X5+7LMyH1mIy2xJdLfo8Q==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
-                "esbuild": "^0.19.3",
-                "postcss": "^8.4.32",
-                "rollup": "^4.2.0"
+                "esbuild": "^0.21.3",
+                "postcss": "^8.4.43",
+                "rollup": "^4.20.0"
             },
             "bin": {
                 "vite": "bin/vite.js"
@@ -962,6 +1632,7 @@
                 "less": "*",
                 "lightningcss": "^1.21.0",
                 "sass": "*",
+                "sass-embedded": "*",
                 "stylus": "*",
                 "sugarss": "*",
                 "terser": "^5.4.0"
@@ -979,6 +1650,9 @@
                 "sass": {
                     "optional": true
                 },
+                "sass-embedded": {
+                    "optional": true
+                },
                 "stylus": {
                     "optional": true
                 },
diff --git a/vite.config.js b/vite.config.js
index c7e37a8..33bf43a 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -7,10 +7,10 @@ export default defineConfig({
     outDir: join(__dirname, "inst/www/react-tools/"),
     lib: {
       // Could also be a dictionary or array of multiple entry points
-      entry: resolve(__dirname, '/srcjs/react-tools.js'),
+      entry: resolve(__dirname, 'srcjs/react-tools.js'),
       name: 'reactR',
-      // the proper extensions will be added
-      fileName: 'react-tools',
+      fileName: () => 'react-tools.js',
+      formats: ['umd'],
     },
     rollupOptions: {
       external: ['react', 'react-dom', 'jquery', 'shiny'],