diff --git a/contracts/v1/Configuration.sol b/contracts/v1/Configuration.sol
index 6f3ffef..b6451b7 100644
--- a/contracts/v1/Configuration.sol
+++ b/contracts/v1/Configuration.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 
 contract Configuration {
diff --git a/contracts/v1/Core.sol b/contracts/v1/Core.sol
index 3db0641..d2540d8 100644
--- a/contracts/v1/Core.sol
+++ b/contracts/v1/Core.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 pragma experimental ABIEncoderV2;
 
diff --git a/contracts/v1/Delegation.sol b/contracts/v1/Delegation.sol
index 07f74a1..3324b89 100644
--- a/contracts/v1/Delegation.sol
+++ b/contracts/v1/Delegation.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 
 import "./Core.sol";
diff --git a/contracts/v1/Governance.sol b/contracts/v1/Governance.sol
index 51adca9..23c9001 100644
--- a/contracts/v1/Governance.sol
+++ b/contracts/v1/Governance.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 pragma experimental ABIEncoderV2;
 
diff --git a/contracts/v1/Mocks/Dummy.sol b/contracts/v1/Mocks/Dummy.sol
index 32ae85d..172e767 100644
--- a/contracts/v1/Mocks/Dummy.sol
+++ b/contracts/v1/Mocks/Dummy.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 
 contract Dummy {
diff --git a/contracts/v1/Mocks/MockGovernance.sol b/contracts/v1/Mocks/MockGovernance.sol
index 622146e..08f83de 100644
--- a/contracts/v1/Mocks/MockGovernance.sol
+++ b/contracts/v1/Mocks/MockGovernance.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 pragma experimental ABIEncoderV2;
 
diff --git a/contracts/v1/Mocks/MockProxy.sol b/contracts/v1/Mocks/MockProxy.sol
index 771ccd7..e6d2f13 100644
--- a/contracts/v1/Mocks/MockProxy.sol
+++ b/contracts/v1/Mocks/MockProxy.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 
 import "../LoopbackProxy.sol";
diff --git a/contracts/v1/Mocks/Proposal.sol b/contracts/v1/Mocks/Proposal.sol
index b8ef584..d6fdda6 100644
--- a/contracts/v1/Mocks/Proposal.sol
+++ b/contracts/v1/Mocks/Proposal.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 
 import "./Dummy.sol";
diff --git a/contracts/v1/Mocks/ProposalStateChangeGovernance.sol b/contracts/v1/Mocks/ProposalStateChangeGovernance.sol
index 49b6d16..f32f80c 100644
--- a/contracts/v1/Mocks/ProposalStateChangeGovernance.sol
+++ b/contracts/v1/Mocks/ProposalStateChangeGovernance.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 
 interface IGovernance {
diff --git a/contracts/v1/Mocks/ProposalUpgrade.sol b/contracts/v1/Mocks/ProposalUpgrade.sol
index 11afe6b..5504b01 100644
--- a/contracts/v1/Mocks/ProposalUpgrade.sol
+++ b/contracts/v1/Mocks/ProposalUpgrade.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 pragma experimental ABIEncoderV2;
 
diff --git a/contracts/v1/Mocks/TORNMock.sol b/contracts/v1/Mocks/TORNMock.sol
index 5a83dd8..80b7ab8 100644
--- a/contracts/v1/Mocks/TORNMock.sol
+++ b/contracts/v1/Mocks/TORNMock.sol
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: MIT
 
-//SPDX-License-Identifier: MIT
 pragma solidity ^0.6.0;
 pragma experimental ABIEncoderV2;