diff --git a/lib/fortnox/api/models/article.rb b/lib/fortnox/api/models/article.rb
index 66c74236..c1d70ad7 100644
--- a/lib/fortnox/api/models/article.rb
+++ b/lib/fortnox/api/models/article.rb
@@ -73,10 +73,10 @@ class Article < Fortnox::API::Model::Base
         attribute :purchase_account, Types::Sized::Integer[0, 9_999]
 
         # PurchasePrice Purchase price of the article
-        attribute :purchase_price, Types::Sized::Float[0.0, 99_999_999_999_999.9]
+        attribute :purchase_price, Types::Sized::Float[-9_999_999_999_999.9, 9_999_999_999_999.9]
 
         # QuantityInStock Quantity in stock of the article
-        attribute :quantity_in_stock, Types::Sized::Float[0.0, 99_999_999_999_999.9]
+        attribute :quantity_in_stock, Types::Sized::Float[-9_999_999_999_999.9, 9_999_999_999_999.9]
 
         # ReservedQuantity Reserved quantity of the article
         attribute :reserved_quantity, Types::Nullable::Float.is(:read_only)
@@ -98,7 +98,7 @@ class Article < Fortnox::API::Model::Base
         attribute :stock_value, Types::Nullable::Float.is(:read_only)
 
         # StockWarning When to start warning for low quantity in stock
-        attribute :stock_warning, Types::Sized::Float[0.0, 99_999_999_999_999.9]
+        attribute :stock_warning, Types::Sized::Float[-9_999_999_999_999.9, 9_999_999_999_999.9]
 
         # SupplierName Name of the supplier
         attribute :supplier_name, Types::Nullable::String.is(:read_only)
diff --git a/lib/fortnox/api/types/document_row.rb b/lib/fortnox/api/types/document_row.rb
index 9d8ba6e8..adda4d80 100644
--- a/lib/fortnox/api/types/document_row.rb
+++ b/lib/fortnox/api/types/document_row.rb
@@ -20,16 +20,14 @@ class DocumentRow < Fortnox::API::Types::Model
         attribute :cost_center, Types::Nullable::String
 
         # DeliveredQuantity Delivered quantity. 14 digits
-        attribute :delivered_quantity, Types::Sized::Float[-9_999_999_999_999.9, 9_999_999_999_999.9]
+        attribute :delivered_quantity, Types::Sized::Float[-999_999.9, 999_999.9]
 
         # Description Description Row description. 50 characters
         attribute :description, Types::Sized::String[50]
 
         # Discount amount. 12 digits (for amount) / 5 digits (for percent)
-        # TODO(hannes): Verify that we can send in more than 5 digits through
-        # the actual API for DiscountType PERCENT. This cannot be done until
-        # we fix issue #62...
-        attribute :discount, Types::Sized::Float[0.0, 99_999_999_999.9]
+        # TODO: Should be [-100.0, 100.0] for DiscountType PERCENT.
+        attribute :discount, Types::Sized::Float[-9_999_999_999.9, 9_999_999_999.9]
 
         # DiscountType The type of discount used for the row.
         attribute :discount_type, Types::DiscountType
@@ -45,7 +43,7 @@ class DocumentRow < Fortnox::API::Types::Model
         attribute :housework_type, Types::HouseworkType
 
         # Price Price per unit. 12 digits
-        attribute :price, Types::Sized::Float[0.0, 99_999_999_999.9]
+        attribute :price, Types::Sized::Float[-9_999_999_999.9, 9_999_999_999.9]
 
         # Project Code of the project for the row.
         attribute :project, Types::Nullable::String
diff --git a/spec/fortnox/api/types/examples/document_row.rb b/spec/fortnox/api/types/examples/document_row.rb
index 2c5af10f..bb419e7f 100644
--- a/spec/fortnox/api/types/examples/document_row.rb
+++ b/spec/fortnox/api/types/examples/document_row.rb
@@ -12,14 +12,7 @@
 
   it { is_expected.to have_housework_type(:housework_type, valid_hash) }
 
-  it { is_expected.to have_sized_float(:price, 0.0, 99_999_999_999.9, valid_hash) }
-
-  it do
-    is_expected.to have_sized_float(
-      :delivered_quantity,
-      -9_999_999_999_999.9,
-      9_999_999_999_999.9,
-      valid_hash
-    )
-  end
+  it { is_expected.to have_sized_float(:discount, -9_999_999_999.9, 9_999_999_999.9, valid_hash) }
+  it { is_expected.to have_sized_float(:price, -9_999_999_999.9, 9_999_999_999.9, valid_hash) }
+  it { is_expected.to have_sized_float(:delivered_quantity, -999_999.9, 999_999.9, valid_hash) }
 end