diff --git a/contracts/polygon/connectors/limitOrder/events.sol b/contracts/polygon/connectors/limitOrder/events.sol
index f7e1767d..659c9d3f 100644
--- a/contracts/polygon/connectors/limitOrder/events.sol
+++ b/contracts/polygon/connectors/limitOrder/events.sol
@@ -1,4 +1,5 @@
-pragma solidity ^0.8.1;
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
 // SPDX-License-Identifier: MIT
 
 contract Events {
diff --git a/contracts/polygon/connectors/limitOrder/helpers.sol b/contracts/polygon/connectors/limitOrder/helpers.sol
index bc2a6343..a59c68e4 100644
--- a/contracts/polygon/connectors/limitOrder/helpers.sol
+++ b/contracts/polygon/connectors/limitOrder/helpers.sol
@@ -1,7 +1,8 @@
-pragma solidity ^0.8.1;
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
 // SPDX-License-Identifier: MIT
 
-import { Basic } from "../../common/basic.sol";
+import { Basic, TokenInterface } from "../../common/basic.sol";
 import "./interface.sol";
 
 contract Helpers is Basic {
diff --git a/contracts/polygon/connectors/limitOrder/interface.sol b/contracts/polygon/connectors/limitOrder/interface.sol
index 1c67e00a..04eb6531 100644
--- a/contracts/polygon/connectors/limitOrder/interface.sol
+++ b/contracts/polygon/connectors/limitOrder/interface.sol
@@ -1,4 +1,5 @@
-pragma solidity ^0.8.1;
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
 // SPDX-License-Identifier: MIT
 
 interface IUniLimitOrder {
diff --git a/contracts/polygon/connectors/limitOrder/main.sol b/contracts/polygon/connectors/limitOrder/main.sol
index d09f6d1b..f39ee592 100644
--- a/contracts/polygon/connectors/limitOrder/main.sol
+++ b/contracts/polygon/connectors/limitOrder/main.sol
@@ -1,4 +1,5 @@
-pragma solidity ^0.8.1;
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
 // SPDX-License-Identifier: MIT
 
 import {Helpers} from "./helpers.sol";
@@ -48,7 +49,7 @@ contract LimitOrderConnector is Helpers {
         setUint(setId_, liquidity_);
 
         eventName_ = "LogCreate(uint256,uint256,uint256,int24,int24)";
-        _eventParam = abi.encode(
+        eventParam_ = abi.encode(
             tokenId_,
             liquidity_,
             minAmount_,