diff --git a/packages/common/components/src/ui/date-picker/index.tsx b/packages/common/components/src/ui/date-picker/index.tsx
index 67265df0e..85c584e5f 100644
--- a/packages/common/components/src/ui/date-picker/index.tsx
+++ b/packages/common/components/src/ui/date-picker/index.tsx
@@ -40,10 +40,8 @@ export function DatePicker({
         </Button>
       </PopoverTrigger>
       <PopoverContent
-        className={cn(
-          "w-auto p-0",
-          zIndex ? `z-[${zIndex}]` : "" // zIndex가 있으면 적용, 없으면 기본값
-        )}
+        className="w-auto p-0"
+        style={{ zIndex: zIndex || 'auto' }}
       >
         <Calendar classNames={{ cell: "rounded-md" }} {...props} />
       </PopoverContent>