diff --git a/README.md b/README.md
index ea8115e67..6c115a048 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ In this challenge you should build an API for an application that stores and man
 1. __Creation__ of an investment with an owner, a creation date and an amount.
     1. The creation date of an investment can be today or a date in the past.
     2. An investment should not be or become negative.
+    3. Creation date, owner and initial amount can't be changed after creation.
 2. __View__ of an investment with its initial amount and expected balance.
     1. Expected balance should be the sum of the invested amount and the [gains][].
     2. If an investment was already withdrawn then the balance must reflect the gains of that investment
@@ -17,10 +18,11 @@ In this challenge you should build an API for an application that stores and man
        partial withdrawn is not supported.
     2. Withdrawals can happen in the past or today, but can't happen before the investment creation or the future.
     3. [Taxes][taxes] need to be applied to the withdrawals before showing the final value.
-4. __List__ of a person's investments
+4. __List__ of a owner's investments
     1. This list should have pagination.
 
-__NOTE:__ the implementation of an interface will not be evaluated.
+> **Note**  
+> The implementation of an interface will not be evaluated.
 
 ### Gain Calculation