diff --git a/README.md b/README.md
index b391f28..229dcb0 100644
--- a/README.md
+++ b/README.md
@@ -24,14 +24,10 @@ $ npx hardhat node --fork <https://eth-mainnet.alchemyapi.io/v2/API_KEY> --fork-
 $ npx hardhat test
 ```
 
-## Checklist for batch size changing
-
-find and replace the `CHUNK_TREE_HEIGHT = ` in following files
-
-1. `circuits/BatchTreeUpdate.circom`
-2. `contracts/TornadoTrees.sol`
-3. `tornadoTrees.test.js`
-
 ## build large circuits
 
-1. docker build . -t tornadocash/tornado-trees
+Make sure you have enough RAM
+
+```bash
+docker build . -t tornadocash/tornado-trees
+```
diff --git a/contracts/TornadoTrees.sol b/contracts/TornadoTrees.sol
index b83835c..65b2c8e 100644
--- a/contracts/TornadoTrees.sol
+++ b/contracts/TornadoTrees.sol
@@ -7,6 +7,7 @@ import "./interfaces/ITornadoTreesV1.sol";
 import "./interfaces/IBatchTreeUpdateVerifier.sol";
 import "@openzeppelin/upgrades-core/contracts/Initializable.sol";
 
+/// @dev This contract holds a merkle tree of all tornado cash deposit and withdrawal events
 contract TornadoTrees is Initializable {
   address public immutable governance;
   bytes32 public depositRoot;
@@ -209,7 +210,7 @@ contract TornadoTrees is Initializable {
   }
 
   /// @dev There is no array length getter for deposit and withdrawal arrays
-  /// in previous contract, so we have to find them length manually.
+  /// in the previous contract, so we have to find them length manually.
   /// Used only during deployment
   function findArrayLength(
     ITornadoTreesV1 _tornadoTreesV1,