diff --git a/nhentai/serializer.py b/nhentai/serializer.py
index 30b4493..b87db5f 100644
--- a/nhentai/serializer.py
+++ b/nhentai/serializer.py
@@ -2,7 +2,7 @@
 import json
 import os
 from xml.sax.saxutils import escape
-from constant import LANGUAGEISO
+from nhentai.constant import LANGUAGEISO
 
 def serialize_json(doujinshi, dir):
     metadata = {'title': doujinshi.name,