diff --git a/module-user/src/main/java/org/example/domain/workbook/service/CreateWorkbookService.java b/module-user/src/main/java/org/example/domain/workbook/service/CreateWorkbookService.java
index 19d180ea..d1218cc2 100644
--- a/module-user/src/main/java/org/example/domain/workbook/service/CreateWorkbookService.java
+++ b/module-user/src/main/java/org/example/domain/workbook/service/CreateWorkbookService.java
@@ -133,7 +133,7 @@ private List<Problem> createPrepareWorkbook(Week week, Long studyId) {
         int idx = count * MAX_MEMBER_PER_QUERY + i;
         if (idx >= studyMemberList.size()) break;
 
-        queryList.get(count).append(" -s@").append(studyMemberList.get(idx));
+        queryList.get(count).append(" -s@").append(studyMemberList.get(idx).getHandle());
       }
     }