diff --git a/src/utils/miner.rs b/src/utils/miner.rs
index 107a61f6d7db9dc33d53d33236cb85c01df27d7c..18da69f9cc257535794240a6bfefe4e54566f863 100644
--- a/src/utils/miner.rs
+++ b/src/utils/miner.rs
@@ -3,6 +3,7 @@ use std::time::SystemTime;
 use ecomobicoin_jsonrpc::types::{Behavior, BehaviorMessage, Bytes};
 use ethereum_interfaces::types::H256;
 use ethereum_types::{Address, U64};
+use ethers::utils::keccak256;
 use ethers::{
     signers::{LocalWallet, Signer},
     types::{
@@ -10,7 +11,6 @@ use ethers::{
         TransactionRequest,
     },
 };
-use ethers::utils::keccak256;
 use ethnum::U256;
 
 /// Get a RPC Behavior for miner with default values, ready to send.
@@ -40,8 +40,8 @@ pub fn get_miner_behavior(
                 .saturating_mul(U256::from(MEAN_VDF_DIFFICULTY_PER_SEC * 60))
                 .saturating_div(U256::from(1000000_u128)),
         },
-        //  default 1 min
-        _ => U256::from(MEAN_VDF_DIFFICULTY_PER_SEC * 60),
+        //  default
+        _ => U256::from(10_000_u128),
     };
     let behavior_msg = BehaviorMessage{
         chain_id: U64::from(chain_id),