diff --git a/bijoe/engine.py b/bijoe/engine.py
index 799bbbc..11a4626 100644
--- a/bijoe/engine.py
+++ b/bijoe/engine.py
@@ -3,6 +3,8 @@ import logging
 import collections
 import psycopg2
 
+psycopg2.extensions.register_type(psycopg2.extensions.UNICODE)
+psycopg2.extensions.register_type(psycopg2.extensions.UNICODEARRAY)
 
 def to_tuple(cur, values):
     return cur.mogrify(', '.join(['%s'] * len(values)), values)