diff --git a/SmartContract/Best_Practices/Best_Practices.md b/SmartContract/Best_Practices/Best_Practices.md
index 2ac9145..d317e34 100644
--- a/SmartContract/Best_Practices/Best_Practices.md
+++ b/SmartContract/Best_Practices/Best_Practices.md
@@ -11,7 +11,7 @@ There are many utilities for this types and it can make your life much easier wh
 
 One of the most precious utilities methods is the convertion between these 3 types!
 
-> OBS: the BigInteger type can be only an 32bit number.
+> OBS: the BigInteger type is limited to a 32 bytes number (which is much bigger than usual int 4B and long 8B). See MaxSizeForBigInteger on ApplicationEngine.
 
 ## Data Structure
 
@@ -111,4 +111,4 @@ Take into acount that below 10GAS the tax of executing the code is free, so use
 
 **Check the system fees [here](http://docs.neo.org/en-us/sc/systemfees.html)**
 
-[Back](../SmartContract.md)
\ No newline at end of file
+[Back](../SmartContract.md)