diff --git a/contracts/arbitrum/connectors/approve-tokens-multisig-staging/events.sol b/contracts/arbitrum/connectors/approve-tokens-multisig-staging/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/arbitrum/connectors/approve-tokens-multisig-staging/events.sol
+++ b/contracts/arbitrum/connectors/approve-tokens-multisig-staging/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/arbitrum/connectors/approve-tokens-multisig-staging/interface.sol b/contracts/arbitrum/connectors/approve-tokens-multisig-staging/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/arbitrum/connectors/approve-tokens-multisig-staging/interface.sol
+++ b/contracts/arbitrum/connectors/approve-tokens-multisig-staging/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/arbitrum/connectors/approve-tokens-multisig-staging/main.sol b/contracts/arbitrum/connectors/approve-tokens-multisig-staging/main.sol
index c1dcae0f..26dbe9bb 100644
--- a/contracts/arbitrum/connectors/approve-tokens-multisig-staging/main.sol
+++ b/contracts/arbitrum/connectors/approve-tokens-multisig-staging/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
diff --git a/contracts/arbitrum/connectors/approve-tokens-multisig/events.sol b/contracts/arbitrum/connectors/approve-tokens-multisig/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/arbitrum/connectors/approve-tokens-multisig/events.sol
+++ b/contracts/arbitrum/connectors/approve-tokens-multisig/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/arbitrum/connectors/approve-tokens-multisig/interface.sol b/contracts/arbitrum/connectors/approve-tokens-multisig/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/arbitrum/connectors/approve-tokens-multisig/interface.sol
+++ b/contracts/arbitrum/connectors/approve-tokens-multisig/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/arbitrum/connectors/approve-tokens-multisig/main.sol b/contracts/arbitrum/connectors/approve-tokens-multisig/main.sol
index 6cf0cda2..fb1e14c5 100644
--- a/contracts/arbitrum/connectors/approve-tokens-multisig/main.sol
+++ b/contracts/arbitrum/connectors/approve-tokens-multisig/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
diff --git a/contracts/avalanche/connectors/approve-tokens-multisig-staging/events.sol b/contracts/avalanche/connectors/approve-tokens-multisig-staging/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/avalanche/connectors/approve-tokens-multisig-staging/events.sol
+++ b/contracts/avalanche/connectors/approve-tokens-multisig-staging/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/avalanche/connectors/approve-tokens-multisig-staging/interface.sol b/contracts/avalanche/connectors/approve-tokens-multisig-staging/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/avalanche/connectors/approve-tokens-multisig-staging/interface.sol
+++ b/contracts/avalanche/connectors/approve-tokens-multisig-staging/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/avalanche/connectors/approve-tokens-multisig-staging/main.sol b/contracts/avalanche/connectors/approve-tokens-multisig-staging/main.sol
index de092e62..2a6f29a3 100644
--- a/contracts/avalanche/connectors/approve-tokens-multisig-staging/main.sol
+++ b/contracts/avalanche/connectors/approve-tokens-multisig-staging/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
diff --git a/contracts/avalanche/connectors/approve-tokens-multisig/events.sol b/contracts/avalanche/connectors/approve-tokens-multisig/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/avalanche/connectors/approve-tokens-multisig/events.sol
+++ b/contracts/avalanche/connectors/approve-tokens-multisig/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/avalanche/connectors/approve-tokens-multisig/interface.sol b/contracts/avalanche/connectors/approve-tokens-multisig/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/avalanche/connectors/approve-tokens-multisig/interface.sol
+++ b/contracts/avalanche/connectors/approve-tokens-multisig/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/avalanche/connectors/approve-tokens-multisig/main.sol b/contracts/avalanche/connectors/approve-tokens-multisig/main.sol
index 2805b8cb..d47a0fd9 100644
--- a/contracts/avalanche/connectors/approve-tokens-multisig/main.sol
+++ b/contracts/avalanche/connectors/approve-tokens-multisig/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
diff --git a/contracts/base/connectors/approve-tokens-multisig-staging/events.sol b/contracts/base/connectors/approve-tokens-multisig-staging/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/base/connectors/approve-tokens-multisig-staging/events.sol
+++ b/contracts/base/connectors/approve-tokens-multisig-staging/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/base/connectors/approve-tokens-multisig-staging/interface.sol b/contracts/base/connectors/approve-tokens-multisig-staging/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/base/connectors/approve-tokens-multisig-staging/interface.sol
+++ b/contracts/base/connectors/approve-tokens-multisig-staging/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/base/connectors/approve-tokens-multisig-staging/main.sol b/contracts/base/connectors/approve-tokens-multisig-staging/main.sol
index 394d64c9..fbf54893 100644
--- a/contracts/base/connectors/approve-tokens-multisig-staging/main.sol
+++ b/contracts/base/connectors/approve-tokens-multisig-staging/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
diff --git a/contracts/base/connectors/approve-tokens-multisig/events.sol b/contracts/base/connectors/approve-tokens-multisig/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/base/connectors/approve-tokens-multisig/events.sol
+++ b/contracts/base/connectors/approve-tokens-multisig/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/base/connectors/approve-tokens-multisig/interface.sol b/contracts/base/connectors/approve-tokens-multisig/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/base/connectors/approve-tokens-multisig/interface.sol
+++ b/contracts/base/connectors/approve-tokens-multisig/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/base/connectors/approve-tokens-multisig/main.sol b/contracts/base/connectors/approve-tokens-multisig/main.sol
index 66c2c27d..e6d5cdcf 100644
--- a/contracts/base/connectors/approve-tokens-multisig/main.sol
+++ b/contracts/base/connectors/approve-tokens-multisig/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
diff --git a/contracts/mainnet/connectors/approve-tokens-multisig-staging/events.sol b/contracts/mainnet/connectors/approve-tokens-multisig-staging/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/mainnet/connectors/approve-tokens-multisig-staging/events.sol
+++ b/contracts/mainnet/connectors/approve-tokens-multisig-staging/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/mainnet/connectors/approve-tokens-multisig-staging/interface.sol b/contracts/mainnet/connectors/approve-tokens-multisig-staging/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/mainnet/connectors/approve-tokens-multisig-staging/interface.sol
+++ b/contracts/mainnet/connectors/approve-tokens-multisig-staging/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/mainnet/connectors/approve-tokens-multisig-staging/main.sol b/contracts/mainnet/connectors/approve-tokens-multisig-staging/main.sol
index fa9a1d3c..c285d781 100644
--- a/contracts/mainnet/connectors/approve-tokens-multisig-staging/main.sol
+++ b/contracts/mainnet/connectors/approve-tokens-multisig-staging/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
diff --git a/contracts/mainnet/connectors/approve-tokens-multisig/events.sol b/contracts/mainnet/connectors/approve-tokens-multisig/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/mainnet/connectors/approve-tokens-multisig/events.sol
+++ b/contracts/mainnet/connectors/approve-tokens-multisig/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/mainnet/connectors/approve-tokens-multisig/interface.sol b/contracts/mainnet/connectors/approve-tokens-multisig/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/mainnet/connectors/approve-tokens-multisig/interface.sol
+++ b/contracts/mainnet/connectors/approve-tokens-multisig/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/mainnet/connectors/approve-tokens-multisig/main.sol b/contracts/mainnet/connectors/approve-tokens-multisig/main.sol
index 3f93e900..7fdc1fe4 100644
--- a/contracts/mainnet/connectors/approve-tokens-multisig/main.sol
+++ b/contracts/mainnet/connectors/approve-tokens-multisig/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
diff --git a/contracts/optimism/connectors/approve-tokens-multisig-staging/events.sol b/contracts/optimism/connectors/approve-tokens-multisig-staging/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/optimism/connectors/approve-tokens-multisig-staging/events.sol
+++ b/contracts/optimism/connectors/approve-tokens-multisig-staging/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/optimism/connectors/approve-tokens-multisig-staging/interface.sol b/contracts/optimism/connectors/approve-tokens-multisig-staging/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/optimism/connectors/approve-tokens-multisig-staging/interface.sol
+++ b/contracts/optimism/connectors/approve-tokens-multisig-staging/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/optimism/connectors/approve-tokens-multisig-staging/main.sol b/contracts/optimism/connectors/approve-tokens-multisig-staging/main.sol
index d7acbb58..7ca14aa0 100644
--- a/contracts/optimism/connectors/approve-tokens-multisig-staging/main.sol
+++ b/contracts/optimism/connectors/approve-tokens-multisig-staging/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
@@ -33,6 +33,6 @@ contract ApproveTokensResolver is Events {
     }
 }
 
-contract ConnectV2ApproveTokensMultisigPolygon is ApproveTokensResolver {
+contract ConnectV2ApproveTokensMultisigOptimism is ApproveTokensResolver {
     string constant public name = "ApproveTokens-v1";
 }
\ No newline at end of file
diff --git a/contracts/optimism/connectors/approve-tokens-multisig/events.sol b/contracts/optimism/connectors/approve-tokens-multisig/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/optimism/connectors/approve-tokens-multisig/events.sol
+++ b/contracts/optimism/connectors/approve-tokens-multisig/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/optimism/connectors/approve-tokens-multisig/interface.sol b/contracts/optimism/connectors/approve-tokens-multisig/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/optimism/connectors/approve-tokens-multisig/interface.sol
+++ b/contracts/optimism/connectors/approve-tokens-multisig/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/optimism/connectors/approve-tokens-multisig/main.sol b/contracts/optimism/connectors/approve-tokens-multisig/main.sol
index 031f1b86..63bd4f7a 100644
--- a/contracts/optimism/connectors/approve-tokens-multisig/main.sol
+++ b/contracts/optimism/connectors/approve-tokens-multisig/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
@@ -33,6 +33,6 @@ contract ApproveTokensResolver is Events {
     }
 }
 
-contract ConnectV2ApproveTokensMultisigPolygon is ApproveTokensResolver {
+contract ConnectV2ApproveTokensMultisigOptimism is ApproveTokensResolver {
     string constant public name = "ApproveTokens-v1";
 }
\ No newline at end of file
diff --git a/contracts/polygon/connectors/approve-tokens-multisig-staging/events.sol b/contracts/polygon/connectors/approve-tokens-multisig-staging/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/polygon/connectors/approve-tokens-multisig-staging/events.sol
+++ b/contracts/polygon/connectors/approve-tokens-multisig-staging/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/polygon/connectors/approve-tokens-multisig-staging/interface.sol b/contracts/polygon/connectors/approve-tokens-multisig-staging/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/polygon/connectors/approve-tokens-multisig-staging/interface.sol
+++ b/contracts/polygon/connectors/approve-tokens-multisig-staging/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/polygon/connectors/approve-tokens-multisig-staging/main.sol b/contracts/polygon/connectors/approve-tokens-multisig-staging/main.sol
index d7acbb58..9d9be117 100644
--- a/contracts/polygon/connectors/approve-tokens-multisig-staging/main.sol
+++ b/contracts/polygon/connectors/approve-tokens-multisig-staging/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
diff --git a/contracts/polygon/connectors/approve-tokens-multisig/events.sol b/contracts/polygon/connectors/approve-tokens-multisig/events.sol
index 3daaaa03..1b7d35e5 100644
--- a/contracts/polygon/connectors/approve-tokens-multisig/events.sol
+++ b/contracts/polygon/connectors/approve-tokens-multisig/events.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 contract Events {
     event LogApproveTokensMultisig(address[] tokenAddresses, uint256[] amounts, uint32 index);
diff --git a/contracts/polygon/connectors/approve-tokens-multisig/interface.sol b/contracts/polygon/connectors/approve-tokens-multisig/interface.sol
index 3ae3daf3..626d1b15 100644
--- a/contracts/polygon/connectors/approve-tokens-multisig/interface.sol
+++ b/contracts/polygon/connectors/approve-tokens-multisig/interface.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 interface IAvoFactoryMultisig {
     function computeAvocado(address owner_, uint32 index_) external view returns (address computedAddress_);
diff --git a/contracts/polygon/connectors/approve-tokens-multisig/main.sol b/contracts/polygon/connectors/approve-tokens-multisig/main.sol
index 031f1b86..f0b608fa 100644
--- a/contracts/polygon/connectors/approve-tokens-multisig/main.sol
+++ b/contracts/polygon/connectors/approve-tokens-multisig/main.sol
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
+pragma solidity ^0.7.0;
 
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";