diff --git a/cmd/dwelling-upload-clean/main.go b/cmd/dwelling-upload-clean/main.go
index 37fd1bc..04f1e23 100644
--- a/cmd/dwelling-upload-clean/main.go
+++ b/cmd/dwelling-upload-clean/main.go
@@ -3,7 +3,6 @@ package main
 import (
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"path"
@@ -28,15 +27,21 @@ func main() {
 		return
 	}
 
-	uploadsDir, err := ioutil.ReadDir(*uploadDir)
+	uploadsDir, err := os.ReadDir(*uploadDir)
 	if err != nil {
-		log.Fatalf("failed to open directory %s: %s\n", *uploadDir, err)
+		log.Fatalf("failed to open a directory %s: %s\n", *uploadDir, err)
 	}
 
 	for _, entry := range uploadsDir {
-		if time.Now().UTC().Sub(entry.ModTime().UTC()) >= time.Duration(*keepForHours)*time.Hour {
+		file, err := os.Stat(entry.Name())
+		if err != nil {
+			log.Printf("failed to stat a file %s: %s", entry.Name(), err)
+			continue
+		}
+
+		if time.Now().UTC().Sub(file.ModTime().UTC()) >= time.Duration(*expiry)*time.Hour {
 			if err := os.Remove(path.Join(*uploadDir, entry.Name())); err != nil {
-				log.Printf("failed to remove file %s: %s", entry.Name(), err)
+				log.Printf("failed to remove a file %s: %s", entry.Name(), err)
 			}
 		}
 	}