diff --git a/contracts/SmartRoute/adapter/CurveUnderlyingAdapter.sol b/contracts/SmartRoute/adapter/CurveUnderlyingAdapter.sol
index 26ddf52..6543d0d 100644
--- a/contracts/SmartRoute/adapter/CurveUnderlyingAdapter.sol
+++ b/contracts/SmartRoute/adapter/CurveUnderlyingAdapter.sol
@@ -8,7 +8,7 @@
 pragma solidity 0.6.9;
 
 import {IDODOAdapter} from "../intf/IDODOAdapter.sol";
-import {ICurve} from "../intf/IDepth.sol";
+import {ICurve} from "../intf/ICurve.sol";
 import {IERC20} from "../../intf/IERC20.sol";
 import {SafeMath} from "../../lib/SafeMath.sol";
 import {UniversalERC20} from "../lib/UniversalERC20.sol";
@@ -21,14 +21,14 @@ contract CurveUnderlyingAdapter is IDODOAdapter {
     //fromToken == token[0], underlying
     function sellBase(address to, address pool, bytes memory moreInfo) external override {
         (address fromToken, address toToken, int128 i, int128 j) = abi.decode(moreInfo, (address, address, int128, int128));
-        require(fromToken == IDepth(pool).underlying_coins(i), 'DepthAdapter: WRONG_TOKEN');
-        require(toToken == IDepth(pool).underlying_coins(j), 'DepthAdapter: WRONG_TOKEN');
+        require(fromToken == ICurve(pool).underlying_coins(i), 'DepthAdapter: WRONG_TOKEN');
+        require(toToken == ICurve(pool).underlying_coins(j), 'DepthAdapter: WRONG_TOKEN');
         uint256 sellBaseAmount = IERC20(fromToken).balanceOf(address(this));
 
         // approve
         IERC20(fromToken).approve(pool, sellBaseAmount);
         // swap
-        IDepth(pool).exchange_underlying(i, j, sellBaseAmount, 0);
+        ICurve(pool).exchange_underlying(i, j, sellBaseAmount, 0);
         if(to != address(this)) {
             SafeERC20.safeTransfer(IERC20(toToken), to, IERC20(toToken).balanceOf(address(this)));
         }
@@ -37,14 +37,14 @@ contract CurveUnderlyingAdapter is IDODOAdapter {
     //fromToken == token[1], underlying
     function sellQuote(address to, address pool, bytes memory moreInfo) external override {
         (address fromToken, address toToken, int128 i, int128 j) = abi.decode(moreInfo, (address, address, int128, int128));
-        require(fromToken == IDepth(pool).underlying_coins(i), 'DepthAdapter: WRONG_TOKEN');
-        require(toToken == IDepth(pool).underlying_coins(j), 'DepthAdapter: WRONG_TOKEN');
+        require(fromToken == ICurve(pool).underlying_coins(i), 'DepthAdapter: WRONG_TOKEN');
+        require(toToken == ICurve(pool).underlying_coins(j), 'DepthAdapter: WRONG_TOKEN');
         uint256 sellQuoteAmount = IERC20(toToken).balanceOf(address(this));
 
         // approve
         IERC20(toToken).approve(pool, sellQuoteAmount);
         // swap
-        IDepth(pool).exchange_underlying(i, j, sellQuoteAmount, 0);
+        ICurve(pool).exchange_underlying(i, j, sellQuoteAmount, 0);
         if(to != address(this)) {
             SafeERC20.safeTransfer(IERC20(fromToken), to, IERC20(fromToken).balanceOf(address(this)));
         }