diff --git a/execution/execution.proto b/execution/execution.proto
index 53da324..8f3c7ee 100644
--- a/execution/execution.proto
+++ b/execution/execution.proto
@@ -133,6 +133,7 @@ message AssembleBlockRequest {
     bool no_tx_pool = 8;
     optional uint64 gas_limit = 9;
     optional bytes eip_1559_params = 10;
+    optional uint64 min_base_fee = 11;
 }
 
 message AssembleBlockResponse {