diff --git a/packages/backend/src/server/web/boot.js b/packages/backend/src/server/web/boot.js
index a9ee0df4f1..94329e11c9 100644
--- a/packages/backend/src/server/web/boot.js
+++ b/packages/backend/src/server/web/boot.js
@@ -54,14 +54,10 @@
 	//#endregion
 
 	//#region Script
-	const salt = localStorage.getItem('salt')
-		? `?salt=${localStorage.getItem('salt')}`
-		: '';
-
-	import(`/assets/${CLIENT_ENTRY}${salt}`)
-		.catch(async () => {
+	import(`/assets/${CLIENT_ENTRY}`)
+		.catch(async e => {
 			await checkUpdate();
-			renderError('APP_FETCH_FAILED');
+			renderError('APP_FETCH_FAILED', JSON.stringify(e));
 		})
 	//#endregion
 
@@ -142,9 +138,6 @@
 
 	// eslint-disable-next-line no-inner-declarations
 	function refresh() {
-		// Random
-		localStorage.setItem('salt', Math.random().toString().substr(2, 8));
-
 		// Clear cache (service worker)
 		try {
 			navigator.serviceWorker.controller.postMessage('clear');
diff --git a/packages/backend/src/server/web/index.ts b/packages/backend/src/server/web/index.ts
index 0b2c62c044..2feee72be7 100644
--- a/packages/backend/src/server/web/index.ts
+++ b/packages/backend/src/server/web/index.ts
@@ -247,7 +247,7 @@ router.get(['/@:user', '/@:user/:sub'], async (ctx, next) => {
 			icon: meta.iconUrl,
 			themeColor: meta.themeColor,
 		});
-		ctx.set('Cache-Control', 'public, max-age=30');
+		ctx.set('Cache-Control', 'public, max-age=15');
 	} else {
 		// リモートユーザーなので
 		// モデレータがAPI経由で参照可能にするために404にはしない
@@ -292,7 +292,7 @@ router.get('/notes/:note', async (ctx, next) => {
 			themeColor: meta.themeColor,
 		});
 
-		ctx.set('Cache-Control', 'public, max-age=180');
+		ctx.set('Cache-Control', 'public, max-age=15');
 
 		return;
 	}
@@ -329,7 +329,7 @@ router.get('/@:user/pages/:page', async (ctx, next) => {
 		});
 
 		if (['public'].includes(page.visibility)) {
-			ctx.set('Cache-Control', 'public, max-age=180');
+			ctx.set('Cache-Control', 'public, max-age=15');
 		} else {
 			ctx.set('Cache-Control', 'private, max-age=0, must-revalidate');
 		}
@@ -360,7 +360,7 @@ router.get('/clips/:clip', async (ctx, next) => {
 			themeColor: meta.themeColor,
 		});
 
-		ctx.set('Cache-Control', 'public, max-age=180');
+		ctx.set('Cache-Control', 'public, max-age=15');
 
 		return;
 	}
@@ -385,7 +385,7 @@ router.get('/gallery/:post', async (ctx, next) => {
 			themeColor: meta.themeColor,
 		});
 
-		ctx.set('Cache-Control', 'public, max-age=180');
+		ctx.set('Cache-Control', 'public, max-age=15');
 
 		return;
 	}
@@ -409,7 +409,7 @@ router.get('/channels/:channel', async (ctx, next) => {
 			themeColor: meta.themeColor,
 		});
 
-		ctx.set('Cache-Control', 'public, max-age=180');
+		ctx.set('Cache-Control', 'public, max-age=15');
 
 		return;
 	}
@@ -468,7 +468,7 @@ router.get('(.*)', async ctx => {
 		icon: meta.iconUrl,
 		themeColor: meta.themeColor,
 	});
-	ctx.set('Cache-Control', 'public, max-age=300');
+	ctx.set('Cache-Control', 'public, max-age=15');
 });
 
 // Register router
diff --git a/packages/backend/src/server/web/views/base.pug b/packages/backend/src/server/web/views/base.pug
index 69ddb73c0a..230ed1578a 100644
--- a/packages/backend/src/server/web/views/base.pug
+++ b/packages/backend/src/server/web/views/base.pug
@@ -37,6 +37,10 @@ html
 		link(rel='prefetch' href='https://xn--931a.moe/assets/not-found.jpg')
 		link(rel='prefetch' href='https://xn--931a.moe/assets/error.jpg')
 		link(rel='stylesheet' href='/assets/fontawesome/css/all.css')
+		link(rel='modulepreload' href=`/assets/${clientEntry.file}`)
+
+		each href in clientEntry.css
+			link(rel='preload' href=`/assets/${href}` as='style')
 
 		each href in clientEntry.css
 			link(rel='preload' href=`/assets/${href}` as='style')