diff --git a/packages/backend/src/server/web/boot.js b/packages/backend/src/server/web/boot.js
index 169996731..124f25f5e 100644
--- a/packages/backend/src/server/web/boot.js
+++ b/packages/backend/src/server/web/boot.js
@@ -108,7 +108,7 @@
 		if (!errorsElement) {
 			document.getElementsByTagName("head")[0].insertAdjacentHTML(
 				"beforeend",
-				`<link rel="stylesheet" href="../boot.css" />`);
+				`<link rel="stylesheet" href="../error.css" />`);
 			document.documentElement.innerHTML = `
 			<svg class="icon-warning" xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-alert-triangle" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round">
    			<path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
diff --git a/packages/backend/src/server/web/boot.css b/packages/backend/src/server/web/error.css
similarity index 100%
rename from packages/backend/src/server/web/boot.css
rename to packages/backend/src/server/web/error.css
diff --git a/packages/backend/src/server/web/views/flush.pug b/packages/backend/src/server/web/views/flush.pug
index 07811e7b3..b08f61c73 100644
--- a/packages/backend/src/server/web/views/flush.pug
+++ b/packages/backend/src/server/web/views/flush.pug
@@ -6,7 +6,7 @@ html
 		meta(name='application-name' content='Misskey')
 		title Flushing Misskey
 		style
-			include ../boot.css
+			include ../error.css
 	#msg
 	script.
 		const msg = document.getElementById('msg');