diff --git a/packages/backend/src/server/api/endpoints/notes/create.ts b/packages/backend/src/server/api/endpoints/notes/create.ts
index 513b77b98a..49287f4de9 100644
--- a/packages/backend/src/server/api/endpoints/notes/create.ts
+++ b/packages/backend/src/server/api/endpoints/notes/create.ts
@@ -283,7 +283,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				} else if (isPureRenote(reply)) {
 					throw new ApiError(meta.errors.cannotReplyToPureRenote);
 				} else if (!await this.noteEntityService.isVisibleForMe(reply, me.id)) {
-					throw new ApiError(meta.errors.cannotReplyToInvisibleNote);
+					throw new ApiError(meta.errors.noSuchReplyTarget);
 				}
 
 				// Check blocking
diff --git a/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts b/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
index c2e36f58b8..7d55353d98 100644
--- a/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
+++ b/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
@@ -258,7 +258,7 @@ export default function(props: MfmProps) {
 							style: 'display: inline-block; font-size: 90%; border: solid 1px var(--divider); border-radius: 999px; padding: 4px 10px 4px 6px;',
 						}, [
 							h('i', {
-								class: 'ti ti-clock',
+								class: 'ph-clock ph-bold ph-lg',
 								style: 'margin-right: 0.25em;',
 							}),
 							h(MkTime, {
diff --git a/packages/frontend/src/pages/admin/index.vue b/packages/frontend/src/pages/admin/index.vue
index ae62145400..cf62767f05 100644
--- a/packages/frontend/src/pages/admin/index.vue
+++ b/packages/frontend/src/pages/admin/index.vue
@@ -302,7 +302,7 @@ function lookup(ev: MouseEvent) {
 		},
 	}, {
 		text: `${i18n.ts.user} (${i18n.ts.email})`,
-		icon: 'ti ti-user',
+		icon: 'ph-user ph-bold ph-lg',
 		action: () => {
 			lookupUserByEmail();
 		},
diff --git a/packages/frontend/src/ui/deck/column.vue b/packages/frontend/src/ui/deck/column.vue
index 6e626da11c..09e91360b6 100644
--- a/packages/frontend/src/ui/deck/column.vue
+++ b/packages/frontend/src/ui/deck/column.vue
@@ -186,7 +186,7 @@ function getMenu() {
 
 	if (props.refresher) {
 		items = [{
-			icon: 'ti ti-refresh',
+			icon: 'ph-arrows-counter-clockwise ph-bold ph-lg',
 			text: i18n.ts.reload,
 			action: () => {
 				if (props.refresher) {