diff --git a/oxrlib/rate.py b/oxrlib/rate.py
index 9bfef8c..c3ad960 100644
--- a/oxrlib/rate.py
+++ b/oxrlib/rate.py
@@ -45,7 +45,7 @@ class Rate:
 
     @classmethod
     def from_json_file(cls, json_file):
-        response = json.load(json_file, parse_float=decimal.Decimal)
+        response = json.load(json_file, parse_int=decimal.Decimal, parse_float=decimal.Decimal)
         return cls(**response)
 
     def convert(self, amount, from_currency, to_currency):