diff --git a/currencies/management/commands/_openexchangerates.py b/currencies/management/commands/_openexchangerates.py
index 8fa4805..493e5f6 100644
--- a/currencies/management/commands/_openexchangerates.py
+++ b/currencies/management/commands/_openexchangerates.py
@@ -81,7 +81,7 @@ def get_ratetimestamp(self, base, code):
         """Return rate timestamp as a datetime/date or None"""
         self.get_latestcurrencyrates(base)
         try:
-            return datetime.fromtimestamp(self.rates["timestamp"])
+            return datetime.fromtimestamp(float(self.rates["timestamp"]))
         except KeyError:
             return None