diff --git a/src/base/TornadoProposal.sol b/src/base/TornadoProposal.sol
index 970283f..b0c0bad 100644
--- a/src/base/TornadoProposal.sol
+++ b/src/base/TornadoProposal.sol
@@ -8,7 +8,9 @@ import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import {IGovernance} from "common/interfaces/IGovernance.sol";
 import {IGnosisSafe} from "common/interfaces/IGnosisSafe.sol";
 
-contract TornadoProposal {
+abstract contract TornadoProposal {
+    function executeProposal() public virtual;
+
     function getMultisig() internal pure returns (IGnosisSafe) {
         return IGnosisSafe(0xb04E030140b30C27bcdfaafFFA98C57d80eDa7B4);
     }