diff --git a/src/client/app/desktop/views/components/note.sub.vue b/src/client/app/desktop/views/components/note.sub.vue
index 3c1c9f9ecb..98baa2038c 100644
--- a/src/client/app/desktop/views/components/note.sub.vue
+++ b/src/client/app/desktop/views/components/note.sub.vue
@@ -1,5 +1,5 @@
 <template>
-<div class="tkfdzaxtkdeianobciwadajxzbddorql" :class="{ mini: narrow }" :title="title" style="border-left: solid 4px var(--primary)">
+<div class="tkfdzaxtkdeianobciwadajxzbddorql" :class="{ mini: narrow }" :title="title" style="border-left: solid 2px var(--primary)">
 	<mk-avatar class="avatar" :user="note.user"/>
 	<div class="main">
 		<mk-note-header class="header" :note="note"/>
diff --git a/src/client/app/desktop/views/components/note.vue b/src/client/app/desktop/views/components/note.vue
index 598cf36900..7cdd4b1357 100644
--- a/src/client/app/desktop/views/components/note.vue
+++ b/src/client/app/desktop/views/components/note.vue
@@ -156,7 +156,7 @@ export default Vue.extend({
 
 <style lang="css" scoped>
 .reply-border {
-	border-left: solid 4px var(--primary)
+	border-left: solid 2px var(--primary)
 }
 
 .note-reply-frame {
diff --git a/src/client/app/mobile/views/components/note.sub.vue b/src/client/app/mobile/views/components/note.sub.vue
index 3cd2931215..17f4a6d47b 100644
--- a/src/client/app/mobile/views/components/note.sub.vue
+++ b/src/client/app/mobile/views/components/note.sub.vue
@@ -1,5 +1,5 @@
 <template>
-<div class="zlrxdaqttccpwhpaagdmkawtzklsccam" :class="{ smart: $store.state.device.postStyle == 'smart', mini: narrow }" style="border-left: solid 4px var(--primary)">
+<div class="zlrxdaqttccpwhpaagdmkawtzklsccam" :class="{ smart: $store.state.device.postStyle == 'smart', mini: narrow }" style="border-left: solid 2px var(--primary)">
 	<mk-avatar class="avatar" :user="note.user" v-if="$store.state.device.postStyle != 'smart'"/>
 	<div class="main">
 		<mk-note-header class="header" :note="note" :mini="true"/>
diff --git a/src/client/app/mobile/views/components/note.vue b/src/client/app/mobile/views/components/note.vue
index 365808aaff..2e9948659a 100644
--- a/src/client/app/mobile/views/components/note.vue
+++ b/src/client/app/mobile/views/components/note.vue
@@ -149,7 +149,7 @@ export default Vue.extend({
 
 <style lang="css" scoped>
 .reply-border {
-	border-left: solid 4px var(--primary)
+	border-left: solid 2px var(--primary)
 }
 
 .note-reply-frame {