diff --git a/contracts/UniswapV2.sol b/contracts/UniswapV2.sol
index e0e7bc2..4c9c78e 100644
--- a/contracts/UniswapV2.sol
+++ b/contracts/UniswapV2.sol
@@ -29,9 +29,8 @@ contract UniswapV2 is IUniswapV2, ERC20("Uniswap V2", "UNI-V2", 18, 0), SafeTran
     address public token1;
 
     TokenData private reserves;
-
-    OracleData public oracleDataToken0;
-    OracleData public oracleDataToken1;
+    OracleData private oracleDataToken0;
+    OracleData private oracleDataToken1;
 
     bool private notEntered = true;
     modifier lock() {
diff --git a/contracts/interfaces/IUniswapV2.sol b/contracts/interfaces/IUniswapV2.sol
index e323808..caf030e 100644
--- a/contracts/interfaces/IUniswapV2.sol
+++ b/contracts/interfaces/IUniswapV2.sol
@@ -34,8 +34,9 @@ interface IUniswapV2 {
     function token1() external view returns (address);
 
     function getReserves() external view returns (uint128, uint128);
-    function getAccumulatedPrices() external view returns (uint256, uint256);
-    function getBlockNumberLast() external view returns (uint32);
+    function readOraclePricesAccumulated() external view returns (uint240, uint240);
+    function readOracleBlockNumber() external view returns (uint32);
+    function consultOracle() external view returns (uint240, uint240);
 
     function getAmountOutput(uint128 amountInput, uint128 reserveInput, uint128 reserveOutput)
         external pure returns (uint128 amountOutput);