diff --git a/src/client/components/hcaptcha.vue b/src/client/components/hcaptcha.vue
index 4711b303d..f49336648 100644
--- a/src/client/components/hcaptcha.vue
+++ b/src/client/components/hcaptcha.vue
@@ -40,20 +40,12 @@ export default Vue.extend({
 		if (window.hcaptcha) { // loaded
 			this.available = true;
 		} else {
-			const alreadyLoading = document.getElementById('hcaptcha');
-
-			if (alreadyLoading) { // loading
-				alreadyLoading.addEventListener('load', () => this.available = true);
-
-				return;
-			} // init
-
-			const script = document.createElement('script');
-			script.addEventListener('load', () => this.available = true);
-			script.async = true;
-			script.id = 'hcaptcha';
-			script.src = 'https://hcaptcha.com/1/api.js?render=explicit';
-			document.head.appendChild(script);
+			(document.getElementById('hcaptcha') || (x => document.head.appendChild(Object.assign(x, {
+				async: true,
+				id: 'hcaptcha',
+				src: 'https://hcaptcha.com/1/api.js?render=explicit',
+			})))(document.createElement('script')))
+				.addEventListener('load', () => this.available = true);
 		}
 	},
 
diff --git a/src/client/pages/instance/settings.vue b/src/client/pages/instance/settings.vue
index 088db8763..1292316b2 100644
--- a/src/client/pages/instance/settings.vue
+++ b/src/client/pages/instance/settings.vue
@@ -371,11 +371,10 @@ export default Vue.extend({
 			}
 
 			if (recaptchaLoaded) { // loaded
-				delete window.onRecaptchaLoad;
 				renderRecaptchaPreview();
 			} else { // init
 				window.onRecaptchaLoad = () => {
-					recaptchaLoaded = true;
+					recaptchaLoaded = delete window.onRecaptchaLoad;
 					renderRecaptchaPreview();
 				};
 				const script = document.createElement('script');
diff --git a/src/server/api/private/signup.ts b/src/server/api/private/signup.ts
index e23fe4358..04d0501b6 100644
--- a/src/server/api/private/signup.ts
+++ b/src/server/api/private/signup.ts
@@ -14,7 +14,7 @@ export default async (ctx: Koa.Context) => {
 	// ただしテスト時はこの機構は障害となるため無効にする
 	if (process.env.NODE_ENV !== 'test' && instance.enableHcaptcha && instance.hcaptchaSecretKey) {
 		const success = await verify(instance.hcaptchaSecretKey, body['hcaptcha-response']).then(
-			({ 'error-codes': x }) => !x || !x.length,
+			({ success }) => success,
 			() => false,
 		);