diff --git a/libraries/chain/db_block.cpp b/libraries/chain/db_block.cpp
index 7625178a..dfa6c4d1 100644
--- a/libraries/chain/db_block.cpp
+++ b/libraries/chain/db_block.cpp
@@ -336,8 +336,6 @@ processed_transaction database::validate_transaction( const signed_transaction&
 
 processed_transaction database::push_proposal(const proposal_object& proposal)
 { try {
-   FC_ASSERT( _undo_db.size() < _undo_db.max_size(), "Undo database is full!" );
-
    transaction_evaluation_state eval_state(this);
    eval_state._is_proposed_trx = true;
 
@@ -347,6 +345,8 @@ processed_transaction database::push_proposal(const proposal_object& proposal)
    size_t old_applied_ops_size = _applied_ops.size();
 
    try {
+      if( _undo_db.size() >= _undo_db.max_size() )
+         _undo_db.set_max_size( _undo_db.size() + 1 );
       auto session = _undo_db.start_undo_session(true);
       for( auto& op : proposal.proposed_transaction.operations )
          eval_state.operation_results.emplace_back(apply_operation(eval_state, op));
diff --git a/programs/witness_node/genesis.json b/programs/witness_node/genesis.json
index ab153e7b..1e18d592 100644
--- a/programs/witness_node/genesis.json
+++ b/programs/witness_node/genesis.json
@@ -352,7 +352,15 @@
     "maximum_tournament_start_time_in_future": 2419200,
     "maximum_tournament_start_delay": 604800,
     "maximum_tournament_number_of_wins": 100,
-    "extensions": {}
+    "extensions": {
+       "son_vesting_amount": 5000000,
+       "son_vesting_period": 172800,
+       "son_pay_daily_max": 20000000,
+       "son_pay_time": 86400,
+       "son_deregister_time": 43200,
+       "son_heartbeat_frequency": 180,
+       "son_down_time": 360
+    }
   },
   "initial_bts_accounts": [],
   "initial_accounts": [{
@@ -493,4 +501,4 @@
     "num_special_accounts": 0,
     "num_special_assets": 0
   }
-}
\ No newline at end of file
+}