diff --git a/flutter_inappwebview_web/lib/web/in_app_web_view_web_element.dart b/flutter_inappwebview_web/lib/web/in_app_web_view_web_element.dart
index 2e9a114f6..0887af959 100644
--- a/flutter_inappwebview_web/lib/web/in_app_web_view_web_element.dart
+++ b/flutter_inappwebview_web/lib/web/in_app_web_view_web_element.dart
@@ -65,7 +65,7 @@ class InAppWebViewWebElement implements Disposable {
     });
 
     jsWebView = flutterInAppWebView?.createFlutterInAppWebView(
-        _viewId, iframe, iframeContainer);
+        _viewId.toString(), iframe, iframeContainer);
   }
 
   /// Handles method calls over the MethodChannel of this plugin.
@@ -208,7 +208,7 @@ class InAppWebViewWebElement implements Disposable {
           initialFile = webView.initialFile;
 
           jsWebView = flutterInAppWebView?.createFlutterInAppWebView(
-              _viewId, iframe, iframeContainer);
+              _viewId.toString(), iframe, iframeContainer);
         }
       }
     }
diff --git a/flutter_inappwebview_web/lib/web/js_bridge.dart b/flutter_inappwebview_web/lib/web/js_bridge.dart
index 31b0a05ea..a33df7c2e 100644
--- a/flutter_inappwebview_web/lib/web/js_bridge.dart
+++ b/flutter_inappwebview_web/lib/web/js_bridge.dart
@@ -46,7 +46,7 @@ external FlutterInAppWebViewBridge? get flutterInAppWebView;
 extension type FlutterInAppWebViewBridge._(JSObject _) implements JSObject {
   external JSObject webViews;
   external JSWebView createFlutterInAppWebView(
-      JSAny viewId, HTMLIFrameElement iframe, HTMLDivElement iframeContainer);
+      String viewId, HTMLIFrameElement iframe, HTMLDivElement iframeContainer);
   external JSString getCookieExpirationDate(num timestamp);
 
   /// Allows assigning a function to be callable from `window.flutter_inappwebview.nativeCommunication()`