diff --git a/main.go b/main.go
index ebd3549..664e4c7 100644
--- a/main.go
+++ b/main.go
@@ -419,7 +419,7 @@ func DownloadAndProcessEpub(jnovel jnc.Api, serie jnc.SerieAugmented, volume jnc
 					})
 
 					imageFile := epub.File[imageFileIndex]
-					fileName := fmt.Sprintf("%020s", chapterPageIndex+1) + "." + strings.Split(iParts[len(iParts)-1], ".")[1]
+					fileName := fmt.Sprintf("%02d", chapterPageIndex+1) + "." + strings.Split(iParts[len(iParts)-1], ".")[1]
 
 					err = addFileToZip(newZip, imageFile, fileName)
 					if err != nil {