diff --git a/shared/mainnet/config.yaml b/shared/mainnet/config.yaml
index d6be3a3..7560e95 100644
--- a/shared/mainnet/config.yaml
+++ b/shared/mainnet/config.yaml
@@ -5,10 +5,11 @@ PRESET_BASE: 'mainnet'
 
 # Transition
 # ---------------------------------------------------------------
-# TBD, 2**256-2**10 is a placeholder
-TERMINAL_TOTAL_DIFFICULTY: 115792089237316195423570985008687907853269984665640564039457584007913129638912
+# Expected Sept 15, 2022
+TERMINAL_TOTAL_DIFFICULTY: 58750000000000000000000
 # By default, don't use this param
 TERMINAL_BLOCK_HASH: 0x0000000000000000000000000000000000000000000000000000000000000000
+TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH: 18446744073709551615
 
 
 # Genesis
@@ -34,7 +35,7 @@ ALTAIR_FORK_VERSION: 0x01000000
 ALTAIR_FORK_EPOCH: 74240  # Oct 27, 2021, 10:56:23am UTC
 # Bellatrix
 BELLATRIX_FORK_VERSION: 0x02000000
-BELLATRIX_FORK_EPOCH: 18446744073709551615
+BELLATRIX_FORK_EPOCH: 144896 # Sept 6, 2022, 11:34:47am UTC
 # Capella
 CAPELLA_FORK_VERSION: 0x03000000
 CAPELLA_FORK_EPOCH: 18446744073709551615