diff --git a/.gitignore b/.gitignore
index c546b8d..f6004e8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 *.pdf
 *.png
+.vscode
 
 *.pyc
 
diff --git a/requirements.txt b/requirements.txt
index 60f55bb..c18a25f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,5 @@ tqdm
 requests
 urllib3
 beautifulsoup4
-Pillow
\ No newline at end of file
+Pillow
+fpdf
\ No newline at end of file
diff --git a/src/converter.py b/src/converter.py
index b868fed..b7f3282 100644
--- a/src/converter.py
+++ b/src/converter.py
@@ -1,11 +1,15 @@
 from PIL import Image
+from fpdf import FPDF
 import os
 
 def converter(imgs, PDFPath = './PDF/', title = 'unknow'):
     print('generating a pdf......')
     os.makedirs(PDFPath, exist_ok=True)
     bookPath = PDFPath + title +'.pdf'
-    if len(imgs) == 1:
-        imgs[0].save(bookPath, 'PDF')
-    elif len(imgs) >= 1:
-        imgs[0].save(bookPath, 'PDF', save_all = True, quality=100, append_images = imgs[1:])
+    cover = Image.open(imgs[0])
+    width, height = cover.size
+    pdf = FPDF(unit = 'pt', format = [width, height])
+    for page in imgs:
+        pdf.add_page()
+        pdf.image(page, 0, 0)
+    pdf.output(bookPath, 'F')
diff --git a/src/downloader.py b/src/downloader.py
index d12bc50..8ceefcd 100644
--- a/src/downloader.py
+++ b/src/downloader.py
@@ -7,8 +7,9 @@ def imgDownloaderSingle(imgUrl, page, title = 'unknow', timeout = 60, targetPath
     os.makedirs(targetPath, exist_ok=True)
     r = requests.get(imgUrl, timeout = timeout)
     img = Image.open(BytesIO(r.content))
-    img.save(targetPath+title+'{:03d}'.format(page)+'.png', 'PNG')
-    imgs.append(img)
+    imgFile = targetPath+title+'{:03d}'.format(page)+'.png'
+    img.save(imgFile, 'PNG')
+    imgs.append(imgFile)
     return imgs
 
 def imgDownloaderTotal(urlIter, quality = 'high'):