diff --git a/ja/ebook/04.5.md b/ja/ebook/04.5.md
index 9e109411..e975938a 100644
--- a/ja/ebook/04.5.md
+++ b/ja/ebook/04.5.md
@@ -113,7 +113,8 @@
 			fmt.Println("error opening file")
 			return err
 		}
-
+		defer fh.Close()
+		
 		//iocopy
 		_, err = io.Copy(fileWriter, fh)
 		if err != nil {