diff --git a/protocol/src/types/executor.rs b/protocol/src/types/executor.rs
index a2f39cc2c..71767bae1 100644
--- a/protocol/src/types/executor.rs
+++ b/protocol/src/types/executor.rs
@@ -63,7 +63,7 @@ impl From<Proposal> for ExecutorContext {
             block_coinbase:         h.proposer,
             block_timestamp:        h.timestamp.into(),
             chain_id:               h.chain_id.into(),
-            difficulty:             U256::one(),
+            difficulty:             U256::zero(),
             origin:                 h.proposer,
             gas_price:              U256::one(),
             block_gas_limit:        h.gas_limit,