diff --git a/contracts/PriceEstimator/PriceEstimator.sol b/contracts/PriceEstimator/PriceEstimator.sol
index e32f4df..6442424 100644
--- a/contracts/PriceEstimator/PriceEstimator.sol
+++ b/contracts/PriceEstimator/PriceEstimator.sol
@@ -27,7 +27,7 @@ contract PriceEstimator is IPriceEstimator, OwnableUpgradeableImplementation {
 
     function estimate(address _meter, uint _liters) public view returns(uint256 amount, uint256 price) {        
         require(_meter != address(0));
-        require(_liters > 3000);
+        require(_liters >= 3000);
         require(_liters % 1000 == 0);
 
         uint256 householdSize = householdMetersContract.getHouseholdMembersCount(_meter);
diff --git a/migrations/2_household.js b/migrations/2_household.js
deleted file mode 100644
index 178f7eb..0000000
--- a/migrations/2_household.js
+++ /dev/null
@@ -1,9 +0,0 @@
-var HouseholdMeters = artifacts.require("./HouseholdMeters.sol");
-let PriceEstimator = artifacts.require("./PriceEstimator/PriceEstimator.sol");
-
-module.exports = async function (deployer) {
-    await deployer.deploy(HouseholdMeters);
-    let HouseholdMetersInstance = await HouseholdMeters.deployed();
-
-    await deployer.deploy(PriceEstimator, HouseholdMetersInstance.address);
-};
\ No newline at end of file
diff --git a/migrations/3_waterSystem.js b/migrations/2_waterSystem.js
similarity index 100%
rename from migrations/3_waterSystem.js
rename to migrations/2_waterSystem.js