diff --git a/src/DBR.sol b/src/DBR.sol
index aab6daf..013960f 100644
--- a/src/DBR.sol
+++ b/src/DBR.sol
@@ -8,8 +8,8 @@ pragma solidity ^0.8.13;
    8,   8: */
    9,   9: contract DolaBorrowingRights {
   10,  10: 
-  11     :-    string public name;
-  12     :-    string public symbol;
+       11:+    bytes32 public immutable name;
+       12:+    bytes32 public immutable symbol;
   13,  13:     uint8 public constant decimals = 18;
   14,  14:     uint256 public _totalSupply;
   15,  15:     address public operator;
@@ -34,8 +34,8 @@ contract DolaBorrowingRights {
   34,  34:         address _operator
   35,  35:     ) {
   36,  36:         replenishmentPriceBps = _replenishmentPriceBps;
-  37     :-        name = _name;
-  38     :-        symbol = _symbol;
+       37:+        name = bytes32(bytes(_name));
+       38:+        symbol = bytes32(bytes(_symbol));
   39,  39:         operator = _operator;
   40,  40:         INITIAL_CHAIN_ID = block.chainid;
   41,  41:         INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
@@ -268,7 +268,7 @@ contract DolaBorrowingRights {
  268, 268:             keccak256(
  269, 269:                 abi.encode(
  270, 270:                     keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
- 271     :-                    keccak256(bytes(name)),
+      271:+                    keccak256(bytes.concat(name)),
  272, 272:                     keccak256("1"),
  273, 273:                     block.chainid,
  274, 274:                     address(this)
