diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index caa8c1e35b..bcf2f35c0f 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -116,7 +116,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			</MkReactionsViewer>
 			<footer :class="$style.footer">
 				<button :class="$style.footerButton" class="_button" @click.stop @click="reply()">
-					<i class="ph-arrow-u-up-left ph-bold ph-lg"></i>
+					<i class="ti ti-arrow-back-up"></i>
 					<p v-if="appearNote.repliesCount > 0" :class="$style.footerButtonCount">{{ number(appearNote.repliesCount) }}</p>
 				</button>
 				<button
diff --git a/packages/frontend/src/components/MkNoteDetailed.vue b/packages/frontend/src/components/MkNoteDetailed.vue
index 0ea4896122..05d37694c1 100644
--- a/packages/frontend/src/components/MkNoteDetailed.vue
+++ b/packages/frontend/src/components/MkNoteDetailed.vue
@@ -118,7 +118,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			</div>
 			<MkReactionsViewer v-if="appearNote.reactionAcceptance !== 'likeOnly'" ref="reactionsViewer" :note="appearNote"/>
 			<button class="_button" :class="$style.noteFooterButton" @click="reply()">
-				<i class="ph-arrow-u-up-left ph-bold ph-lg"></i>
+				<i class="ti ti-arrow-back-up"></i>
 				<p v-if="appearNote.repliesCount > 0" :class="$style.noteFooterButtonCount">{{ number(appearNote.repliesCount) }}</p>
 			</button>
 			<button
@@ -163,7 +163,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		</footer>
 	</article>
 	<div :class="$style.tabs">
-		<button class="_button" :class="[$style.tab, { [$style.tabActive]: tab === 'replies' }]" @click="tab = 'replies'"><i class="ph-arrow-u-up-left ph-bold ph-lg"></i> {{ i18n.ts.replies }}</button>
+		<button class="_button" :class="[$style.tab, { [$style.tabActive]: tab === 'replies' }]" @click="tab = 'replies'"><i class="ti ti-arrow-back-up"></i> {{ i18n.ts.replies }}</button>
 		<button class="_button" :class="[$style.tab, { [$style.tabActive]: tab === 'renotes' }]" @click="tab = 'renotes'"><i class="ti ti-repeat"></i> {{ i18n.ts.renotes }}</button>
 		<button class="_button" :class="[$style.tab, { [$style.tabActive]: tab === 'quotes' }]" @click="tab = 'quotes'"><i class="ph-quotes ph-bold ph-lg"></i> {{ i18n.ts._notification._types.quote }}</button>
 		<button class="_button" :class="[$style.tab, { [$style.tabActive]: tab === 'reactions' }]" @click="tab = 'reactions'"><i class="ph-smiley ph-bold ph-lg"></i> {{ i18n.ts.reactions }}</button>
diff --git a/packages/frontend/src/components/MkNotification.vue b/packages/frontend/src/components/MkNotification.vue
index a5211a47db..cb54765de7 100644
--- a/packages/frontend/src/components/MkNotification.vue
+++ b/packages/frontend/src/components/MkNotification.vue
@@ -33,9 +33,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<i v-else-if="notification.type === 'receiveFollowRequest'" class="ti ti-clock"></i>
 			<i v-else-if="notification.type === 'followRequestAccepted'" class="ti ti-check"></i>
 			<i v-else-if="notification.type === 'renote'" class="ti ti-repeat"></i>
-			<i v-else-if="notification.type === 'reply'" class="ph-arrow-u-up-left ph-bold ph-lg"></i>
+			<i v-else-if="notification.type === 'reply'" class="ti ti-arrow-back-up"></i>
 			<i v-else-if="notification.type === 'mention'" class="ph-at ph-bold ph-lg"></i>
-			<i v-else-if="notification.type === 'quote'" class="ph-quotes ph-bold ph-lg"></i>
+			<i v-else-if="notification.type === 'quote'" class="ti ti-quote"></i>
 			<i v-else-if="notification.type === 'pollEnded'" class="ph-chart-bar-horizontal ph-bold ph-lg"></i>
 			<i v-else-if="notification.type === 'achievementEarned'" class="ph-trophy ph-bold ph-lg"></i>
 			<template v-else-if="notification.type === 'roleAssigned'">
@@ -70,14 +70,14 @@ SPDX-License-Identifier: AGPL-3.0-only
 		</header>
 		<div>
 			<MkA v-if="notification.type === 'reaction' || notification.type === 'reaction:grouped'" :class="$style.text" :to="notePage(notification.note)" :title="getNoteSummary(notification.note)">
-				<i class="ph-quotes ph-bold ph-lg" :class="$style.quote"></i>
+				<i class="ti ti-quote" :class="$style.quote"></i>
 				<Mfm :text="getNoteSummary(notification.note)" :isBlock="true" :plain="true" :nowrap="true" :author="notification.note.user"/>
-				<i class="ph-quotes ph-bold ph-lg" :class="$style.quote"></i>
+				<i class="ti ti-quote" :class="$style.quote"></i>
 			</MkA>
 			<MkA v-else-if="notification.type === 'renote' || notification.type === 'renote:grouped'" :class="$style.text" :to="notePage(notification.note)" :title="getNoteSummary(notification.note.renote)">
-				<i class="ph-quotes ph-bold ph-lg" :class="$style.quote"></i>
+				<i class="ti ti-quote" :class="$style.quote"></i>
 				<Mfm :text="getNoteSummary(notification.note.renote)" :isBlock="true" :plain="true" :nowrap="true" :author="notification.note.renote?.user"/>
-				<i class="ph-quotes ph-bold ph-lg" :class="$style.quote"></i>
+				<i class="ti ti-quote" :class="$style.quote"></i>
 			</MkA>
 			<MkA v-else-if="notification.type === 'reply'" :class="$style.text" :to="notePage(notification.note)" :title="getNoteSummary(notification.note)">
 				<Mfm :text="getNoteSummary(notification.note)" :isBlock="true" :plain="true" :nowrap="true" :author="notification.note.user"/>
@@ -92,9 +92,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<Mfm :text="getNoteSummary(notification.note)" :isBlock="true" :plain="true" :nowrap="true" :author="notification.note.user"/>
 			</MkA>
 			<MkA v-else-if="notification.type === 'pollEnded'" :class="$style.text" :to="notePage(notification.note)" :title="getNoteSummary(notification.note)">
-				<i class="ph-quotes ph-bold ph-lg" :class="$style.quote"></i>
+				<i class="ti ti-quote" :class="$style.quote"></i>
 				<Mfm :text="getNoteSummary(notification.note)" :isBlock="true" :plain="true" :nowrap="true" :author="notification.note.user"/>
-				<i class="ph-quotes ph-bold ph-lg" :class="$style.quote"></i>
+				<i class="ti ti-quote" :class="$style.quote"></i>
 			</MkA>
 			<div v-else-if="notification.type === 'roleAssigned'" :class="$style.text">
 				{{ notification.role.name }}
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index da6276a44f..0f49110cfd 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -46,14 +46,14 @@ SPDX-License-Identifier: AGPL-3.0-only
 					<template v-if="posted"></template>
 					<template v-else-if="posting"><MkEllipsis/></template>
 					<template v-else>{{ submitText }}</template>
-					<i style="margin-left: 6px;" :class="posted ? 'ti ti-check' : reply ? 'ph-arrow-u-up-left ph-bold ph-lg' : renote ? 'ph-quotes ph-bold ph-lg' : 'ph-paper-plane-tilt ph-bold ph-lg'"></i>
+					<i style="margin-left: 6px;" :class="posted ? 'ti ti-check' : reply ? 'ti ti-arrow-back-up' : renote ? 'ti ti-quote' : 'ti ti-send'"></i>
 				</div>
 			</button>
 		</div>
 	</header>
 	<MkNoteSimple v-if="reply" :class="$style.targetNote" :hideFiles="true" :note="reply"/>
 	<MkNoteSimple v-if="renote" :class="$style.targetNote" :hideFiles="true" :note="renote"/>
-	<div v-if="quoteId" :class="$style.withQuote"><i class="ph-quotes ph-bold ph-lg"></i> {{ i18n.ts.quoteAttached }}<button @click="quoteId = null"><i class="ti ti-x"></i></button></div>
+	<div v-if="quoteId" :class="$style.withQuote"><i class="ti ti-quote"></i> {{ i18n.ts.quoteAttached }}<button @click="quoteId = null"><i class="ti ti-x"></i></button></div>
 	<div v-if="visibility === 'specified'" :class="$style.toSpecified">
 		<span style="margin-right: 8px;">{{ i18n.ts.recipient }}</span>
 		<div :class="$style.visibleUsers">
diff --git a/packages/frontend/src/components/MkTutorialDialog.Note.vue b/packages/frontend/src/components/MkTutorialDialog.Note.vue
index ef638e5676..cec7d69943 100644
--- a/packages/frontend/src/components/MkTutorialDialog.Note.vue
+++ b/packages/frontend/src/components/MkTutorialDialog.Note.vue
@@ -8,7 +8,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<div style="text-align: center; padding: 0 16px;">{{ i18n.ts._initialTutorial._note.description }}</div>
 	<MkNote :class="$style.exampleNoteRoot" style="pointer-events: none;" :note="exampleNote" :mock="true"/>
 	<div class="_gaps_s">
-		<div><i class="ph-arrow-u-up-left ph-bold ph-lg"></i> <b>{{ i18n.ts.reply }}</b> … {{ i18n.ts._initialTutorial._note.reply }}</div>
+		<div><i class="ti ti-arrow-back-up"></i> <b>{{ i18n.ts.reply }}</b> … {{ i18n.ts._initialTutorial._note.reply }}</div>
 		<div><i class="ti ti-repeat"></i> <b>{{ i18n.ts.renote }}</b> … {{ i18n.ts._initialTutorial._note.renote }}</div>
 		<div><i class="ph-smiley ph-bold ph-lg"></i> <b>{{ i18n.ts.reaction }}</b> … {{ i18n.ts._initialTutorial._note.reaction }}</div>
 		<div><i class="ti ti-dots"></i> <b>{{ i18n.ts.menu }}</b> … {{ i18n.ts._initialTutorial._note.menu }}</div>
diff --git a/packages/frontend/src/pages/admin/email-settings.vue b/packages/frontend/src/pages/admin/email-settings.vue
index 115070716c..ced0c8290c 100644
--- a/packages/frontend/src/pages/admin/email-settings.vue
+++ b/packages/frontend/src/pages/admin/email-settings.vue
@@ -55,7 +55,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkSpacer :contentMax="700" :marginMin="16" :marginMax="16">
 				<div class="_buttons">
 					<MkButton primary rounded @click="save"><i class="ti ti-check"></i> {{ i18n.ts.save }}</MkButton>
-					<MkButton rounded @click="testEmail"><i class="ph-paper-plane-tilt ph-bold ph-lg"></i> {{ i18n.ts.testEmail }}</MkButton>
+					<MkButton rounded @click="testEmail"><i class="ti ti-send"></i> {{ i18n.ts.testEmail }}</MkButton>
 				</div>
 			</MkSpacer>
 		</div>
diff --git a/packages/frontend/src/pages/api-console.vue b/packages/frontend/src/pages/api-console.vue
index 97bed50061..30f12a8fb3 100644
--- a/packages/frontend/src/pages/api-console.vue
+++ b/packages/frontend/src/pages/api-console.vue
@@ -20,7 +20,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				</MkSwitch>
 				<MkButton primary :disabled="sending" @click="send">
 					<template v-if="sending"><MkEllipsis/></template>
-					<template v-else><i class="ph-paper-plane-tilt ph-bold ph-lg"></i> Send</template>
+					<template v-else><i class="ti ti-send"></i> Send</template>
 				</MkButton>
 			</div>
 			<div v-if="res">
diff --git a/packages/frontend/src/pages/welcome.timeline.vue b/packages/frontend/src/pages/welcome.timeline.vue
index 4768e31d1d..3e519c0910 100644
--- a/packages/frontend/src/pages/welcome.timeline.vue
+++ b/packages/frontend/src/pages/welcome.timeline.vue
@@ -9,7 +9,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<div v-for="note in notes" :key="note.id" :class="$style.note">
 			<div class="_panel" :class="$style.content">
 				<div>
-					<MkA v-if="note.replyId" class="reply" :to="`/notes/${note.replyId}`"><i class="ph-arrow-u-up-left ph-bold ph-lg"></i></MkA>
+					<MkA v-if="note.replyId" class="reply" :to="`/notes/${note.replyId}`"><i class="ti ti-arrow-back-up"></i></MkA>
 					<Mfm v-if="note.text" :text="note.text" :isBlock="true" :author="note.user"/>
 					<MkA v-if="note.renoteId" class="rp" :to="`/notes/${note.renoteId}`">RN: ...</MkA>
 				</div>
diff --git a/packages/frontend/vite.config.ts b/packages/frontend/vite.config.ts
index 6e04815c9c..97ec8927ae 100644
--- a/packages/frontend/vite.config.ts
+++ b/packages/frontend/vite.config.ts
@@ -273,6 +273,9 @@ export function getConfig(): UserConfig {
 					'ti ti-arrow-big-right': 'ph-arrow-fat-right ph-bold ph-lg',
 					'ti ti-arrow-up': 'ph-arrow-up ph-bold ph-lg',
 					'ti ti-arrow-down': 'ph-arrow-down ph-bold ph-lg',
+					'ti ti-arrow-back-up': 'ph-arrow-u-up-left ph-bold ph-lg',
+					'ti ti-quote': 'ph-quotes ph-bold ph-lg',
+					'ti ti-send': 'ph-paper-plane-tilt ph-bold ph-lg',
 				},
 			}),
 			...process.env.NODE_ENV === 'production'