diff --git a/contracts/democracy/FeeRecycler.sol b/contracts/democracy/FeeRecycler.sol
index 7011a77..626b6f8 100644
--- a/contracts/democracy/FeeRecycler.sol
+++ b/contracts/democracy/FeeRecycler.sol
@@ -1,4 +1,4 @@
-pragma solidity ^0.4.17;
+pragma solidity ^0.4.21;
 
 import "../common/Controlled.sol";
 import "../token/ERC20Token.sol";