diff --git a/intercom_flutter/CHANGELOG.md b/intercom_flutter/CHANGELOG.md
index 1439805..6a09244 100755
--- a/intercom_flutter/CHANGELOG.md
+++ b/intercom_flutter/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 9.4.19
+
+* Bump `intercom_flutter_web` to `1.1.11`
+
 ## 9.4.18
 
 * Bump Intercom iOS SDK version to [19.3.4](https://github.com/intercom/intercom-ios/releases/tag/19.3.4)
diff --git a/intercom_flutter/pubspec.yaml b/intercom_flutter/pubspec.yaml
index c064bc7..724dde1 100644
--- a/intercom_flutter/pubspec.yaml
+++ b/intercom_flutter/pubspec.yaml
@@ -1,7 +1,7 @@
 name: intercom_flutter
 description: Flutter plugin for Intercom integration. Provides in-app messaging
   and help-center Intercom services
-version: 9.4.18
+version: 9.4.19
 homepage: https://github.com/v3rm0n/intercom_flutter
 
 dependencies:
@@ -10,7 +10,7 @@ dependencies:
   flutter_web_plugins:
     sdk: flutter
   intercom_flutter_platform_interface: ^2.0.6
-  intercom_flutter_web: ^1.1.10
+  intercom_flutter_web: ^1.1.11
 
 dev_dependencies:
   flutter_test:
diff --git a/intercom_flutter_web/CHANGELOG.md b/intercom_flutter_web/CHANGELOG.md
index 9604eec..0581878 100755
--- a/intercom_flutter_web/CHANGELOG.md
+++ b/intercom_flutter_web/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 1.1.11
+
+* JSON-encode `intercomSettings` before injecting the Intercom script to avoid invalid JavaScript
+  syntax. Fixes [#582](https://github.com/v3rm0n/intercom_flutter/issues/582)
+
 ## 1.1.10
 
 * Implemented method `setThemeMode`.
diff --git a/intercom_flutter_web/README.md b/intercom_flutter_web/README.md
index c8e14ac..0f7f2d3 100755
--- a/intercom_flutter_web/README.md
+++ b/intercom_flutter_web/README.md
@@ -8,7 +8,7 @@ This package is already included as part of the `intercom_flutter` package depen
 
 But if you want to use this package as alone, add the dependency `intercom_flutter_web`.
 You don't need to add Intercom script in the index.html file, it will be automatically injected.
-But you can pre-define some Intercom settings, if you want (optional).
+But you can pre-define some Intercom settings, if you want (optional), such as `api_base`, `hide_default_launcher`, etc.
 ```html
 <script>
     window.intercomSettings = {
diff --git a/intercom_flutter_web/lib/intercom_flutter_web.dart b/intercom_flutter_web/lib/intercom_flutter_web.dart
index cb0f29b..1ce94d6 100644
--- a/intercom_flutter_web/lib/intercom_flutter_web.dart
+++ b/intercom_flutter_web/lib/intercom_flutter_web.dart
@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:convert';
 import 'dart:js_interop';
 import 'dart:js_interop_unsafe';
 
@@ -52,7 +53,7 @@ class IntercomFlutterWeb extends IntercomFlutterPlatform {
       web.HTMLScriptElement script =
           web.document.createElement("script") as web.HTMLScriptElement;
       script.text = """
-          window.intercomSettings = ${updateIntercomSettings('app_id', "'$appId'")};
+          window.intercomSettings = ${jsonEncode(updateIntercomSettings('app_id', appId))};
           (function(){var w=window;var ic=w.Intercom;if(typeof ic==="function"){ic('reattach_activator');ic('update',w.intercomSettings);}else{var d=document;var i=function(){i.c(arguments);};i.q=[];i.c=function(args){i.q.push(args);};w.Intercom=i;var l=function(){var s=d.createElement('script');s.type='text/javascript';s.async=true;s.src='https://widget.intercom.io/widget/' + '$appId';var x=d.getElementsByTagName('script')[0];x.parentNode.insertBefore(s, x);};if(document.readyState==='complete'){l();}else if(w.attachEvent){w.attachEvent('onload',l);}else{w.addEventListener('load',l,false);}}})();  
       """;
       if (web.document.body != null) {
diff --git a/intercom_flutter_web/pubspec.yaml b/intercom_flutter_web/pubspec.yaml
index 56e2136..6fbea3e 100644
--- a/intercom_flutter_web/pubspec.yaml
+++ b/intercom_flutter_web/pubspec.yaml
@@ -1,6 +1,6 @@
 name: intercom_flutter_web
 description: Web platform implementation of intercom_flutter
-version: 1.1.10
+version: 1.1.11
 homepage: https://github.com/v3rm0n/intercom_flutter
 
 flutter: