diff --git a/EIPS/eip-20.md b/EIPS/eip-20.md
index 29f5796e..12943e60 100644
--- a/EIPS/eip-20.md
+++ b/EIPS/eip-20.md
@@ -173,8 +173,8 @@ There are already plenty of ERC20-compliant tokens deployed on the Ethereum netw
 Different implementations have been written by various teams that have different trade-offs: from gas saving to improved security.
 
 #### Example implementations are available at
-- https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/token/ERC20/ERC20.sol
-- https://github.com/ConsenSys/Tokens/blob/master/contracts/eip20/EIP20.sol
+- [OpenZeppelin implementation](https://github.com/OpenZeppelin/openzeppelin-solidity/blob/9b3710465583284b8c4c5d2245749246bb2e0094/contracts/token/ERC20/ERC20.sol)
+- [ConsenSys implementation](https://github.com/ConsenSys/Tokens/blob/fdf687c69d998266a95f15216b1955a4965a0a6d/contracts/eip20/EIP20.sol)