diff --git a/app/models/financial_transaction.rb b/app/models/financial_transaction.rb
index 354a3d2a..631390b6 100644
--- a/app/models/financial_transaction.rb
+++ b/app/models/financial_transaction.rb
@@ -3,9 +3,10 @@
 class FinancialTransaction < ActiveRecord::Base
   belongs_to :ordergroup
   belongs_to :user
-  
+
   validates_presence_of :amount, :note, :user_id, :ordergroup_id
-  validates_numericality_of :amount
+  validates_numericality_of :amount, greater_then: -100_000,
+    less_than: 100_000
 
   localize_input_of :amount
 
@@ -14,4 +15,3 @@ class FinancialTransaction < ActiveRecord::Base
     ordergroup.add_financial_transaction! amount, note, user
   end
 end
-