diff --git a/src/ElectronNET.Host/api/browserWindows.js b/src/ElectronNET.Host/api/browserWindows.js
index c707dee..5bda56f 100644
--- a/src/ElectronNET.Host/api/browserWindows.js
+++ b/src/ElectronNET.Host/api/browserWindows.js
@@ -220,8 +220,8 @@ module.exports = (socket, app) => {
                 webPreferences: { nodeIntegration: true, contextIsolation: false },
             };
         }
-        if (options.isRunningBlazor && !options.webPreferences.preload) {
-            options.webPreferences.preload = path.join(__dirname, "..", "scripts", "blazor-preload.js");
+        if (options.isRunningBlazor) {
+            options.webPreferences["preload"] = path.join(__dirname, "..", "scripts", "blazor-preload.js");
         }
         delete options.isRunningBlazor;
         // we dont want to recreate the window when watch is ready.
diff --git a/src/ElectronNET.Host/api/browserWindows.ts b/src/ElectronNET.Host/api/browserWindows.ts
index 3050d13..a8cd92d 100644
--- a/src/ElectronNET.Host/api/browserWindows.ts
+++ b/src/ElectronNET.Host/api/browserWindows.ts
@@ -235,8 +235,8 @@ export = (socket: Socket, app: Electron.App) => {
       };
     }
 
-    if (options.isRunningBlazor && !options.webPreferences.preload) {
-      options.webPreferences.preload = path.join(
+    if (options.isRunningBlazor) {
+      options.webPreferences["preload"] = path.join(
         __dirname,
         "..",
         "scripts",