diff --git a/games/convert_price.py b/games/convert_price.py
index 238657f..e883794 100644
--- a/games/convert_price.py
+++ b/games/convert_price.py
@@ -4,6 +4,7 @@ from games.models import ExchangeRate, Purchase
 
 # fixme: save preferred currency in user model
 currency_to = "CZK"
+currency_to = currency_to.lower()
 
 
 def save_converted_info(purchase, converted_price, converted_currency):
@@ -13,17 +14,18 @@ def save_converted_info(purchase, converted_price, converted_currency):
 
 
 def update_converted_prices():
-    purchases = (
-        Purchase.objects.filter(
-            converted_price__isnull=True, converted_currency__isnull=True
-        )
-        .exclude(price_currency__iexact=currency_to)
-        .exclude(price=0)
+    purchases = Purchase.objects.filter(
+        converted_price__isnull=True, converted_currency__isnull=True
     )
 
     for purchase in purchases:
+        if purchase.price_currency.lower() == currency_to or purchase.price == 0:
+            save_converted_info(
+                purchase, purchase.price, purchase.price_currency.lower()
+            )
+            continue
         year = purchase.date_purchased.year
-        currency_from = purchase.price_currency
+        currency_from = purchase.price_currency.lower()
         exchange_rate = ExchangeRate.objects.filter(
             currency_from=currency_from, currency_to=currency_to, year=year
         ).first()