diff --git a/server/router/api/v1/memo_service.go b/server/router/api/v1/memo_service.go
index 58f36c23..cee3be85 100644
--- a/server/router/api/v1/memo_service.go
+++ b/server/router/api/v1/memo_service.go
@@ -225,7 +225,8 @@ func (s *APIV1Service) UpdateMemo(ctx context.Context, request *v1pb.UpdateMemoR
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "failed to get current user")
 	}
-	if memo.CreatorID != user.ID {
+	// Only the creator or admin can update the memo.
+	if memo.CreatorID != user.ID && !isSuperUser(user) {
 		return nil, status.Errorf(codes.PermissionDenied, "permission denied")
 	}
 
@@ -336,7 +337,8 @@ func (s *APIV1Service) DeleteMemo(ctx context.Context, request *v1pb.DeleteMemoR
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "failed to get current user")
 	}
-	if memo.CreatorID != user.ID {
+	// Only the creator or admin can update the memo.
+	if memo.CreatorID != user.ID && !isSuperUser(user) {
 		return nil, status.Errorf(codes.PermissionDenied, "permission denied")
 	}
 
@@ -1167,3 +1169,7 @@ func substring(s string, length int) string {
 
 	return s[:byteIndex]
 }
+
+func isSuperUser(user *store.User) bool {
+	return user.Role == store.RoleAdmin || user.Role == store.RoleHost
+}
diff --git a/web/src/components/MemoView.tsx b/web/src/components/MemoView.tsx
index a81576fa..5c0a8a95 100644
--- a/web/src/components/MemoView.tsx
+++ b/web/src/components/MemoView.tsx
@@ -8,6 +8,7 @@ import useNavigateTo from "@/hooks/useNavigateTo";
 import { useUserStore, useWorkspaceSettingStore } from "@/store/v1";
 import { MemoRelation_Type } from "@/types/proto/api/v1/memo_relation_service";
 import { Memo, Visibility } from "@/types/proto/api/v1/memo_service";
+import { User_Role } from "@/types/proto/api/v1/user_service";
 import { WorkspaceMemoRelatedSetting } from "@/types/proto/api/v1/workspace_setting_service";
 import { WorkspaceSettingKey } from "@/types/proto/store/workspace_setting";
 import { useTranslate } from "@/utils/i18n";
@@ -53,7 +54,7 @@ const MemoView: React.FC<Props> = (props: Props) => {
     (relation) => relation.type === MemoRelation_Type.COMMENT && relation.relatedMemo === memo.name,
   ).length;
   const relativeTimeFormat = Date.now() - memo.displayTime!.getTime() > 1000 * 60 * 60 * 24 ? "datetime" : "auto";
-  const readonly = memo.creator !== user?.name;
+  const readonly = memo.creator !== user?.name && user.role === User_Role.USER;
   const isInMemoDetailPage = location.pathname.startsWith(`/m/${memo.uid}`);
 
   // Initial related data: creator.