diff --git a/packages/frontend/src/components/global/MkAvatar.vue b/packages/frontend/src/components/global/MkAvatar.vue
index e8e1bc696b..ee224dba49 100644
--- a/packages/frontend/src/components/global/MkAvatar.vue
+++ b/packages/frontend/src/components/global/MkAvatar.vue
@@ -26,7 +26,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<template v-if="showDecoration">
 		<img
 			v-for="decoration in decorations ?? user.avatarDecorations"
-			:class="[$style.decoration]"
+			:class="[$style.decoration, { [$style.decorationBlink]: decoration.blink }]"
 			:src="getDecorationUrl(decoration)"
 			:style="{
 				rotate: getDecorationAngle(decoration),
@@ -60,7 +60,7 @@ const props = withDefaults(defineProps<{
 	link?: boolean;
 	preview?: boolean;
 	indicator?: boolean;
-	decorations?: Omit<Misskey.entities.UserDetailed['avatarDecorations'][number], 'id'>[];
+	decorations?: (Omit<Misskey.entities.UserDetailed['avatarDecorations'][number], 'id'> & { blink?: boolean; })[];
 	forceShowDecoration?: boolean;
 }>(), {
 	target: null,
@@ -330,4 +330,17 @@ watch(() => props.user.avatarBlurhash, () => {
 	width: 200%;
 	pointer-events: none;
 }
+
+.decorationBlink {
+	animation: blink 1s infinite;
+}
+
+@keyframes blink {
+	0%, 100% {
+		filter: brightness(2);
+	}
+	50% {
+		filter: brightness(1);
+	}
+}
 </style>
diff --git a/packages/frontend/src/pages/settings/avatar-decoration.dialog.vue b/packages/frontend/src/pages/settings/avatar-decoration.dialog.vue
index ce1d4e48d8..1938b8d48d 100644
--- a/packages/frontend/src/pages/settings/avatar-decoration.dialog.vue
+++ b/packages/frontend/src/pages/settings/avatar-decoration.dialog.vue
@@ -96,6 +96,7 @@ const decorationsForPreview = computed(() => {
 		flipH: flipH.value,
 		offsetX: offsetX.value,
 		offsetY: offsetY.value,
+		blink: true,
 	};
 	const decorations = [...$i.avatarDecorations];
 	if (props.usingIndex != null) {