diff --git a/src/main/java/org/ntlab/citrusserver/resources/ScheduleRest.java b/src/main/java/org/ntlab/citrusserver/resources/ScheduleRest.java
index 410ab48..8d88538 100644
--- a/src/main/java/org/ntlab/citrusserver/resources/ScheduleRest.java
+++ b/src/main/java/org/ntlab/citrusserver/resources/ScheduleRest.java
@@ -1,5 +1,6 @@
 package org.ntlab.citrusserver.resources;
 
+import jakarta.ws.rs.core.Response;
 import org.ntlab.citrusserver.entities.Schedule;
 import org.ntlab.citrusserver.repositories.AccountManager;
 import org.ntlab.citrusserver.repositories.ScheduleManager;
@@ -78,7 +79,8 @@
             return scheduleManager.addSchedule(accountId, year, month, day,title,startTime,endTime,bookId);
 
         }else {
-            return null;
+            var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
+            throw new WebApplicationException(response.build());
         }
     }
 
@@ -93,7 +95,8 @@
             Schedule schedule = scheduleManager.getScheduleId(accountId, year, month, day, scheduleId);
             return schedule;
         }
-        return null;
+        var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
+        throw new WebApplicationException(response.build());
     }
 
 //    @Path("/{account_id}/schedule/{year}/{month}/{day}/{schedule_id}")