diff --git a/servers/boe-server-all/src/main/java/com/xboe/module/boecase/api/CaseAiChatApi.java b/servers/boe-server-all/src/main/java/com/xboe/module/boecase/api/CaseAiChatApi.java
index b57302da..bbf5b39a 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/module/boecase/api/CaseAiChatApi.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/module/boecase/api/CaseAiChatApi.java
@@ -18,6 +18,7 @@ import javax.servlet.http.HttpServletResponse;
 import java.nio.charset.StandardCharsets;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
 import java.util.List;
 
 /**
@@ -105,8 +106,9 @@ public class CaseAiChatApi extends ApiBaseController {
     public void downloadConversationExcel(@RequestParam String startTime, 
                                           @RequestParam String endTime, 
                                           HttpServletResponse response) {
-        LocalDate startDate = LocalDate.parse(startTime);
-        LocalDate endDate = LocalDate.parse(endTime);
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
+        LocalDate startDate = LocalDate.parse(startTime, formatter);
+        LocalDate endDate = LocalDate.parse(endTime, formatter);
         caseAiChatService.getConversationExcel(startDate.atStartOfDay(), endDate.atTime(23, 59, 59), response);
     }