diff --git a/backend/src/main/java/sw_css/milestone/application/MilestoneHistoryCommandService.java b/backend/src/main/java/sw_css/milestone/application/MilestoneHistoryCommandService.java
index 65fb1658..d22fa3fb 100644
--- a/backend/src/main/java/sw_css/milestone/application/MilestoneHistoryCommandService.java
+++ b/backend/src/main/java/sw_css/milestone/application/MilestoneHistoryCommandService.java
@@ -74,7 +74,7 @@ private String generateFilePath(final MultipartFile file) {
         if (file == null) {
             return null;
         }
-        return UUID.randomUUID() + "_" + file.getOriginalFilename();
+        return UUID.randomUUID() + "_" + file.getOriginalFilename().replaceAll("\\[|\\]", "");
     }
 
     private void uploadFile(final MultipartFile file, final String newFilePath) {