diff --git a/zlpt-common/zlpt-common-core/src/main/java/com/bonus/zlpt/common/core/utils/poi/ExcelUtil.java b/zlpt-common/zlpt-common-core/src/main/java/com/bonus/zlpt/common/core/utils/poi/ExcelUtil.java
index ae81639..0278a6a 100644
--- a/zlpt-common/zlpt-common-core/src/main/java/com/bonus/zlpt/common/core/utils/poi/ExcelUtil.java
+++ b/zlpt-common/zlpt-common-core/src/main/java/com/bonus/zlpt/common/core/utils/poi/ExcelUtil.java
@@ -475,7 +475,7 @@ public class ExcelUtil<T>
     {
 
         String encodedFileName = null;
-        encodedFileName = URLEncoder.encode(fileName, StandardCharsets.UTF_8);
+        encodedFileName = URLEncoder.encode(fileName+".xlsx", StandardCharsets.UTF_8);
         response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
         response.setCharacterEncoding("utf-8");
         response.setHeader("Content-Disposition", "attachment; filename=\"" + encodedFileName + "\"");