diff --git a/src/backend/electron/main.ts b/src/backend/electron/main.ts
index 390cc69468..73aec90dac 100644
--- a/src/backend/electron/main.ts
+++ b/src/backend/electron/main.ts
@@ -400,9 +400,6 @@ async function createWindow() {
     backgroundColor,
     webPreferences: {
       preload: path.join(__dirname, "preload.js"),
-      nodeIntegration: false,
-      contextIsolation: true,
-      sandbox: false, // TODO: 外しても問題ないか検証して外す
     },
     icon: path.join(__static, "icon.png"),
   });
diff --git a/vite.config.mts b/vite.config.mts
index 0fd3ea438c..c6bd3ab3ee 100644
--- a/vite.config.mts
+++ b/vite.config.mts
@@ -82,25 +82,41 @@ export default defineConfig((options) => {
         }),
       isElectron && [
         cleanDistPlugin(),
-        electron({
-          entry: [
-            "./src/backend/electron/main.ts",
-            "./src/backend/electron/preload.ts",
-          ],
-          // ref: https://github.com/electron-vite/vite-plugin-electron/pull/122
-          onstart: ({ startup }) => {
-            if (options.mode !== "test") {
-              startup([".", "--no-sandbox"]);
-            }
+        electron([
+          {
+            entry: "./src/backend/electron/main.ts",
+            // ref: https://github.com/electron-vite/vite-plugin-electron/pull/122
+            onstart: ({ startup }) => {
+              if (options.mode !== "test") {
+                startup([".", "--no-sandbox"]);
+              }
+            },
+            vite: {
+              plugins: [tsconfigPaths({ root: __dirname })],
+              build: {
+                outDir: path.resolve(__dirname, "dist"),
+                sourcemap,
+              },
+            },
           },
-          vite: {
-            plugins: [tsconfigPaths({ root: __dirname })],
-            build: {
-              outDir: path.resolve(__dirname, "dist"),
-              sourcemap,
+          {
+            // ref: https://electron-vite.github.io/guide/preload-not-split.html
+            entry: "./src/backend/electron/preload.ts",
+            onstart({ reload }) {
+              reload();
+            },
+            vite: {
+              plugins: [tsconfigPaths({ root: __dirname })],
+              build: {
+                outDir: path.resolve(__dirname, "dist"),
+                sourcemap,
+                rollupOptions: {
+                  output: { inlineDynamicImports: true },
+                },
+              },
             },
           },
-        }),
+        ]),
       ],
       isBrowser && injectBrowserPreloadPlugin(),
     ],