diff --git a/packages/frontend/package.json b/packages/frontend/package.json
index 2b04d0c5a4..6c50260940 100644
--- a/packages/frontend/package.json
+++ b/packages/frontend/package.json
@@ -19,6 +19,7 @@
 		"@analytics/google-analytics": "1.1.0",
 		"@discordapp/twemoji": "16.0.1",
 		"@github/webauthn-json": "2.1.1",
+		"@mcaptcha/core-glue": "0.1.0-alpha-5",
 		"@mcaptcha/vanilla-glue": "0.1.0-rc2",
 		"@misskey-dev/browser-image-resizer": "2024.1.0",
 		"@rollup/plugin-json": "6.1.0",
diff --git a/packages/frontend/src/components/MkCaptcha.vue b/packages/frontend/src/components/MkCaptcha.vue
index 6e4a8c13d2..2fa1135398 100644
--- a/packages/frontend/src/components/MkCaptcha.vue
+++ b/packages/frontend/src/components/MkCaptcha.vue
@@ -7,8 +7,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 <div>
 	<span v-if="!available">Loading<MkEllipsis/></span>
 	<div v-if="props.provider == 'mcaptcha'">
-		<div id="mcaptcha__widget-container" class="m-captcha-style"></div>
-		<div ref="captchaEl"></div>
+		<iframe
+			v-if="mCaptchaIframeUrl != null"
+			ref="mCaptchaIframe"
+			:src="mCaptchaIframeUrl"
+			style="border: none; max-width: 320px; width: 100%; height: 100%; max-height: 80px;"
+		></iframe>
 	</div>
 	<div v-if="props.provider == 'testcaptcha'" style="background: #eee; border: solid 1px #888; padding: 8px; color: #000; max-width: 320px; display: flex; gap: 10px; align-items: center; box-shadow: 2px 2px 6px #0004; border-radius: 4px;">
 		<img src="/client-assets/testcaptcha.png" style="width: 60px; height: 60px; "/>
@@ -26,7 +30,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { ref, useTemplateRef, computed, onMounted, onBeforeUnmount, watch, onUnmounted } from 'vue';
+import { ref, useTemplateRef, computed, onMounted, onBeforeUnmount, watch, onUnmounted, nextTick } from 'vue';
+import type Reciever_typeReferenceOnly from '@mcaptcha/core-glue';
 import { store } from '@/store.js';
 
 // APIs provided by Captcha services
@@ -71,6 +76,19 @@ const available = ref(false);
 
 const captchaEl = useTemplateRef('captchaEl');
 const captchaWidgetId = ref<string | undefined>(undefined);
+
+let mCaptchaReciever: Reciever_typeReferenceOnly | null = null;
+const mCaptchaIframe = useTemplateRef('mCaptchaIframe');
+const mCaptchaRemoveState = ref(false);
+const mCaptchaIframeUrl = computed(() => {
+	if (props.provider === 'mcaptcha' && !mCaptchaRemoveState.value && props.instanceUrl && props.sitekey) {
+		const url = new URL('/widget', props.instanceUrl);
+		url.searchParams.set('sitekey', props.sitekey);
+		return url.toString();
+	}
+	return null;
+});
+
 const testcaptchaInput = ref('');
 const testcaptchaPassed = ref(false);
 
@@ -129,8 +147,14 @@ function reset() {
 			if (_DEV_) console.warn(error);
 		}
 	}
+
 	testcaptchaPassed.value = false;
 	testcaptchaInput.value = '';
+
+	if (mCaptchaReciever != null) {
+		mCaptchaReciever.destroy();
+		mCaptchaReciever = null;
+	}
 }
 
 function remove() {
@@ -143,6 +167,10 @@ function remove() {
 			if (_DEV_) console.warn(error);
 		}
 	}
+
+	if (props.provider === 'mcaptcha') {
+		mCaptchaRemoveState.value = true;
+	}
 }
 
 async function requestRender() {
@@ -160,32 +188,29 @@ async function requestRender() {
 			'error-callback': () => callback(undefined),
 		});
 	} else if (props.provider === 'mcaptcha' && props.instanceUrl && props.sitekey) {
-		const { default: Widget } = await import('@mcaptcha/vanilla-glue');
-		new Widget({
+		const { default: Reciever } = await import('@mcaptcha/core-glue');
+		mCaptchaReciever = new Reciever({
 			siteKey: {
-				instanceUrl: new URL(props.instanceUrl),
 				key: props.sitekey,
+				instanceUrl: new URL(props.instanceUrl),
 			},
+		}, (token: string) => {
+			callback(token);
 		});
+		mCaptchaReciever.listen();
+		mCaptchaRemoveState.value = false;
 	} else {
-		window.setTimeout(requestRender, 1);
+		window.setTimeout(requestRender, 50);
 	}
 }
 
 function clearWidget() {
-	if (props.provider === 'mcaptcha') {
-		const container = window.document.getElementById('mcaptcha__widget-container');
-		if (container) {
-			container.innerHTML = '';
-		}
-	} else {
-		reset();
-		remove();
+	reset();
+	remove();
 
-		if (captchaEl.value) {
-			// レンダリング先のコンテナの中身を掃除し、フォームが増殖するのを抑止
-			captchaEl.value.innerHTML = '';
-		}
+	if (captchaEl.value) {
+		// レンダリング先のコンテナの中身を掃除し、フォームが増殖するのを抑止
+		captchaEl.value.innerHTML = '';
 	}
 }
 
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 480414122c..8ae2956ccb 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -659,6 +659,9 @@ importers:
       '@github/webauthn-json':
         specifier: 2.1.1
         version: 2.1.1
+      '@mcaptcha/core-glue':
+        specifier: 0.1.0-alpha-5
+        version: 0.1.0-alpha-5
       '@mcaptcha/vanilla-glue':
         specifier: 0.1.0-rc2
         version: 0.1.0-rc2(bufferutil@4.1.0)(utf-8-validate@6.0.6)
@@ -2725,6 +2728,9 @@ packages:
     resolution: {integrity: sha512-aDF3S3rK9Q2gey/WAttUlISduDItz5BU3306M9Eyv6/oS40aMprnopshtlKTykxRNIBEZuRMaZAnbrQ4QtKGyw==}
     hasBin: true
 
+  '@mcaptcha/core-glue@0.1.0-alpha-5':
+    resolution: {integrity: sha512-16qWm5O5X0Y9LXULULaAks8Vf9FNlUUBcR5KDt49aWhFhG5++JzxNmCwQM9EJSHNU7y0U+FdyAWcGmjfKlkRLA==}
+
   '@mcaptcha/core-glue@0.1.0-rc1':
     resolution: {integrity: sha512-P4SgUioJDR38QpnP9sPY72NyaYex8MXD6RbzrfKra+ngamT26XjqVZEHBiZU2RT7u0SsWhuko4N1ntNOghsgpg==}
 
@@ -13199,6 +13205,8 @@ snapshots:
       - supports-color
     optional: true
 
+  '@mcaptcha/core-glue@0.1.0-alpha-5': {}
+
   '@mcaptcha/core-glue@0.1.0-rc1': {}
 
   '@mcaptcha/vanilla-glue@0.1.0-rc2(bufferutil@4.1.0)(utf-8-validate@6.0.6)':