1 files changed, 1 insertions, 1 deletions
diff --git a/model.py b/model.py
index d37bf62..0d2489a 100644
--- a/model.py
+++ b/model.py
@@ -72,7 +72,7 @@ class ConstExpense (Expense):
     next = OneToOne('ConstExpense', inverse = 'prev')
     prev = ManyToOne('ConstExpense')
     
-    monthly = ColumnProperty(lambda c: c.expense / c.months, deferred = True)
+    monthly = ColumnProperty(lambda c: sql.cast(c.expense / c.months, T.Numeric(scale = 2)), deferred = True)
     
     start_year = ColumnProperty(lambda c: sql.extract('year', c.start))
     start_month = ColumnProperty(lambda c: sql.extract('month', c.start))