diff --git a/src/etb/common/consensus.py b/src/etb/common/consensus.py
index 280e3d8..68138b9 100644
--- a/src/etb/common/consensus.py
+++ b/src/etb/common/consensus.py
@@ -121,7 +121,8 @@ class MainnetCustomPreset(PresetEnum, Enum):
     EPOCHS_PER_ETH1_VOTING_PERIOD = 64
     # configs
     # timing
-    SECONDS_PER_SLOT = 3
+    SYNC_COMMITTEE_SIZE = 8
+    SECONDS_PER_SLOT = 4
     SECONDS_PER_ETH1_BLOCK = 1
     MIN_VALIDATOR_WITHDRAWABILITY_DELAY = 256
     SHARD_COMMITTEE_PERIOD = 256