diff --git a/dataset/freeze/format/fjson.py b/dataset/freeze/format/fjson.py
index 99fd29b..fd22cd3 100644
--- a/dataset/freeze/format/fjson.py
+++ b/dataset/freeze/format/fjson.py
@@ -1,6 +1,7 @@
 import json
 from datetime import datetime, date
 from collections import defaultdict
+from decimal import Decimal
 
 from six import PY3