diff --git a/contracts/Lockable.sol b/contracts/Lockable.sol
index 426bf55..0950aee 100644
--- a/contracts/Lockable.sol
+++ b/contracts/Lockable.sol
@@ -1,6 +1,6 @@
 import "./Owned.sol";
 
-pragma solidity ^0.4.8;
+pragma solidity ^0.4.11;
 
 contract Lockable {
     bool public lock = true;
diff --git a/contracts/LockerToken.sol b/contracts/LockerToken.sol
index ff27710..cfc295a 100644
--- a/contracts/LockerToken.sol
+++ b/contracts/LockerToken.sol
@@ -1,5 +1,3 @@
-pragma solidity ^0.4.0;
-
 /**
  * Abstract contract to accept lock and linked locker. 
  * 
@@ -10,6 +8,8 @@ pragma solidity ^0.4.0;
 import "./AbstractToken.sol";
 import "Lockable.sol";
 
+pragma solidity ^0.4.11;
+
 contract LockerToken is AbstractToken, Lockable, Owned {
     Lockable public locker = this;