diff --git a/solidity/security.md b/solidity/security.md
index 106a22e..e584913 100644
--- a/solidity/security.md
+++ b/solidity/security.md
@@ -2,13 +2,13 @@
 
 
 * `tx.origin` is used: you want to replace it by “msg.sender” because otherwise any contract you call can act on your behalf.
-* potential reetrancy bugs: 
+* Avoid potential reetrancy bugs: 
 ```
 msg.sender.transfer(amount);
 balances[msg.sender] -= amount;
 ```
-* inline assembly used: should be used only in rare cases
-* unclear semantics: `now` is alias for `block.timestamp` not current time; use of low level `call`, `callcode`, `delegatecall` should be avoided whenever possible; use `transfer` whenever failure of ether transfer should rollnack the whole transaction.
+* Inline assembly should be used only in rare cases.
+* Unclear semantics: `now` is alias for `block.timestamp` not current time; use of low level `call`, `callcode`, `delegatecall` should be avoided whenever possible; use `transfer` whenever failure of ether transfer should rollnack the whole transaction.
 * Beware of caller contracts: `selfdestruct` can block calling contracts unexpectedly.
 * Invocation of local functions via `this`: never use `this` to call functions in the same contract, it only consumes more gas than normal call.
 * Transferring Ether in a for/while/do-while loop should be avoid due to the block gas limit.