diff --git a/ynab.py b/ynab.py
index 890a6a7..4025a74 100755
--- a/ynab.py
+++ b/ynab.py
@@ -29,7 +29,16 @@ def convert(reader, writer):
         money_out = 0
         money_in = 0
 
-        money = float(row[3].replace(',', '.'))
+        if (isinstance(row[3], str)):
+            moneystr = row[3].replace(',', '.')
+
+            try:
+                money = float(moneystr) if moneystr else 0
+            except ValueError as e:
+                print(f'Error in row {row}')
+                raise e
+        else:
+            money = float(row[3])
 
         if money >= 0:
             money_in = money