diff --git a/execution/execution.proto b/execution/execution.proto
index 8ed11b1..c07c7f1 100644
--- a/execution/execution.proto
+++ b/execution/execution.proto
@@ -71,7 +71,9 @@ message BlockBody {
 
 message Block {
     Header header = 1;
-    BlockBody body = 2; 
+    BlockBody body = 2;
+    bool check_expected_blob_hashes = 3;
+    repeated types.H256 expected_blob_hashes = 4; // added in Dencun (EIP-4844), optional additional check.
 }
 
 message GetHeaderResponse {