diff --git a/packages/backend/src/server/api/endpoints/admin/meta.ts b/packages/backend/src/server/api/endpoints/admin/meta.ts
index 5a69fbf679..dbfa31024a 100644
--- a/packages/backend/src/server/api/endpoints/admin/meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/meta.ts
@@ -128,7 +128,7 @@ export const meta = {
 			},
 			silencedHosts: {
 				type: 'array',
-				optional: true,
+				optional: false,
 				nullable: false,
 				items: {
 					type: 'string',
diff --git a/packages/frontend/src/pages/instance-info.vue b/packages/frontend/src/pages/instance-info.vue
index 929c22d114..821cd599eb 100644
--- a/packages/frontend/src/pages/instance-info.vue
+++ b/packages/frontend/src/pages/instance-info.vue
@@ -190,8 +190,8 @@ const baseDomains = computed(() => {
 	return domains;
 });
 const isBaseBlocked = computed(() => meta.value && baseDomains.value.some(d => meta.value?.blockedHosts.includes(d)));
-const isBaseSilenced = computed(() => meta.value && meta.value.silencedHosts && baseDomains.value.some(d => meta.value?.silencedHosts?.includes(d)));
-const isBaseMediaSilenced = computed(() => meta.value && meta.value.mediaSilencedHosts && baseDomains.value.some(d => meta.value?.mediaSilencedHosts.includes(d)));
+const isBaseSilenced = computed(() => meta.value && baseDomains.value.some(d => meta.value?.silencedHosts.includes(d)));
+const isBaseMediaSilenced = computed(() => meta.value && baseDomains.value.some(d => meta.value?.mediaSilencedHosts.includes(d)));
 
 const usersPagination = {
 	endpoint: iAmModerator ? 'admin/show-users' : 'users' as const,
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 0e83bdfcca..e3bf828982 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -5199,7 +5199,7 @@ export type operations = {
             enableEmail: boolean;
             enableServiceWorker: boolean;
             translatorAvailable: boolean;
-            silencedHosts?: string[];
+            silencedHosts: string[];
             mediaSilencedHosts: string[];
             pinnedUsers: string[];
             hiddenTags: string[];