diff --git a/camelot/core.py b/camelot/core.py
index 3b0a5ad..8d12a04 100644
--- a/camelot/core.py
+++ b/camelot/core.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+from io import open
 import os
 import sqlite3
 import zipfile