diff --git a/contracts/blocksigner/contract/blocksigner.go b/contracts/blocksigner/contract/blocksigner.go
index 4e3a8509bc..385c1f525c 100644
--- a/contracts/blocksigner/contract/blocksigner.go
+++ b/contracts/blocksigner/contract/blocksigner.go
@@ -19,7 +19,7 @@ import (
 const BlockSignerABI = "[{\"constant\":false,\"inputs\":[{\"name\":\"_blockNumber\",\"type\":\"uint256\"},{\"name\":\"_blockHash\",\"type\":\"bytes32\"}],\"name\":\"sign\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"_blockHash\",\"type\":\"bytes32\"}],\"name\":\"getSigners\",\"outputs\":[{\"name\":\"\",\"type\":\"address[]\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"epochNumber\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"_epochNumber\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"name\":\"_signer\",\"type\":\"address\"},{\"indexed\":false,\"name\":\"_blockNumber\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"_blockHash\",\"type\":\"bytes32\"}],\"name\":\"Sign\",\"type\":\"event\"}]"
 
 // BlockSignerBin is the compiled bytecode used for deploying new contracts.
-const BlockSignerBin = `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`
+const BlockSignerBin = `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`
 
 // DeployBlockSigner deploys a new Ethereum contract, binding an instance of BlockSigner to it.
 func DeployBlockSigner(auth *bind.TransactOpts, backend bind.ContractBackend, _epochNumber *big.Int) (common.Address, *types.Transaction, *BlockSigner, error) {