diff --git a/src/interfaces/IBlockTime.sol b/src/interfaces/IBlockTime.sol
index 394ee55..380d1d9 100644
--- a/src/interfaces/IBlockTime.sol
+++ b/src/interfaces/IBlockTime.sol
@@ -9,7 +9,7 @@ interface IBlockTime {
     struct Chronicle {
         uint256 epoch;
         address timeKeeper;
-        bytes32 signature;
+        bytes signature;
     }
 
     /// @notice changes earth avg time