diff --git a/lib/finance/cashflows.rb b/lib/finance/cashflows.rb
index 985ca36..ffc1996 100644
--- a/lib/finance/cashflows.rb
+++ b/lib/finance/cashflows.rb
@@ -22,7 +22,7 @@ class Function
 
       values.each do |key, value|
         define_method key do
-          BigDecimal.new value
+          BigDecimal(value)
         end
       end
 
@@ -33,7 +33,7 @@ def initialize(transactions, function)
 
       def values(x)
         value = @transactions.send(@function, Flt::DecNum.new(x[0].to_s))
-        [ BigDecimal.new(value.to_s) ]
+        [ BigDecimal(value.to_s) ]
       end
     end
 
diff --git a/lib/finance/decimal.rb b/lib/finance/decimal.rb
index 28a72d4..1bbdec5 100644
--- a/lib/finance/decimal.rb
+++ b/lib/finance/decimal.rb
@@ -7,7 +7,7 @@
 end
 
 DecNum.context.define_conversion_to(BigDecimal) do |x|
-  BigDecimal.new(x.to_s)
+  BigDecimal(x.to_s)
 end
 
 class Numeric