diff --git a/erpnext/setup/utils.py b/erpnext/setup/utils.py
index 33af28687c6..27237bf2cbe 100644
--- a/erpnext/setup/utils.py
+++ b/erpnext/setup/utils.py
@@ -107,7 +107,7 @@ def get_exchange_rate(from_currency, to_currency, transaction_date=None, args=No
 			# expire in 6 hours
 			response.raise_for_status()
 			value = response.json()["result"]
-			cache.setex(key, value, 6 * 60 * 60)
+			cache.setex(name=key, time=21600, value=flt(value))
 		return flt(value)
 	except:
 		frappe.log_error(title="Get Exchange Rate")