diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1ec2e86da..a7ca63b5a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,14 @@
 
 -->
 
+## 12.99.3 (2021/12/14)
+### Bugfixes
+- クライアント: オートコンプリートがダイアログの裏に隠れる問題を修正
+
+## 12.99.2 (2021/12/14)
+
+## 12.99.1 (2021/12/14)
+
 ## 12.99.0 (2021/12/14)
 
 ### Improvements
diff --git a/package.json b/package.json
index 9eab3ff4c..42b44331d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "misskey",
-	"version": "12.99.2",
+	"version": "12.99.3",
 	"codename": "indigo",
 	"repository": {
 		"type": "git",
diff --git a/packages/client/src/components/autocomplete.vue b/packages/client/src/components/autocomplete.vue
index d6c972aae..c50f032a5 100644
--- a/packages/client/src/components/autocomplete.vue
+++ b/packages/client/src/components/autocomplete.vue
@@ -1,5 +1,5 @@
 <template>
-<div class="swhvrteh _popup _shadow" @contextmenu.prevent="() => {}">
+<div class="swhvrteh _popup _shadow" :style="{ zIndex }" @contextmenu.prevent="() => {}">
 	<ol v-if="type === 'user'" ref="suggests" class="users">
 		<li v-for="user in users" tabindex="-1" class="user" @click="complete(type, user)" @keydown="onKeydown">
 			<img class="avatar" :src="user.avatarUrl"/>
@@ -157,6 +157,7 @@ export default defineComponent({
 			items: [],
 			mfmTags: [],
 			select: -1,
+			zIndex: os.claimZIndex(true),
 		}
 	},
 
@@ -403,7 +404,6 @@ export default defineComponent({
 <style lang="scss" scoped>
 .swhvrteh {
 	position: fixed;
-	z-index: 65535;
 	max-width: 100%;
 	margin-top: calc(1em + 8px);
 	overflow: hidden;