diff --git a/contracts/interfaces/IQuestFactory.sol b/contracts/interfaces/IQuestFactory.sol
index 1a814998..da275946 100644
--- a/contracts/interfaces/IQuestFactory.sol
+++ b/contracts/interfaces/IQuestFactory.sol
@@ -207,6 +207,16 @@ interface IQuestFactory {
         string memory questName_,
         string memory projectName_
     ) external returns (address);
+    function createERC20Quest(
+        address rewardTokenAddress_,
+        uint256 endTime_,
+        uint256 startTime_,
+        uint256 totalParticipants_,
+        uint256 rewardAmount_,
+        string memory questId_,
+        string memory actionType_,
+        string memory questName_
+    ) external returns (address); // deprecated
     function create1155QuestAndQueue(
         address rewardTokenAddress_,
         uint256 endTime_,