diff --git a/src/main/java/org/ntlab/citrusserver/resources/FavoritedRest.java b/src/main/java/org/ntlab/citrusserver/resources/FavoritedRest.java
index 3d5fcf6..9c5714c 100644
--- a/src/main/java/org/ntlab/citrusserver/resources/FavoritedRest.java
+++ b/src/main/java/org/ntlab/citrusserver/resources/FavoritedRest.java
@@ -2,6 +2,7 @@
 
 import jakarta.ws.rs.*;
 import jakarta.ws.rs.core.MediaType;
+import jakarta.ws.rs.core.Response;
 import org.ntlab.citrusserver.repositories.AccountManager;
 import org.ntlab.citrusserver.repositories.FavoriteManager;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -38,6 +39,9 @@
         if(accountManager.checkToken(other_account_id,token)) {
             favoriteManager.putFavorited(account_id, book_id, other_account_id);
             favoriteManager.putFavorites(other_account_id, account_id, book_id);//変更点（要検討）
+        }else{
+            var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
+            throw new WebApplicationException(response.build());
         }
     }
 
@@ -48,6 +52,9 @@
         if(accountManager.checkToken(other_account_id,token)) {
             favoriteManager.removeFavorited(account_id, book_id, other_account_id);
             favoriteManager.removeFavorites(other_account_id, account_id, book_id);//変更点（要検討）
+        }else{
+            var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
+            throw new WebApplicationException(response.build());
         }
     }
 }