diff --git a/common/eth2_network_config/built_in_network_configs/ropsten/config.yaml b/common/eth2_network_config/built_in_network_configs/ropsten/config.yaml
index 264eaf8230..5dad3ff759 100644
--- a/common/eth2_network_config/built_in_network_configs/ropsten/config.yaml
+++ b/common/eth2_network_config/built_in_network_configs/ropsten/config.yaml
@@ -23,7 +23,7 @@ ALTAIR_FORK_EPOCH: 500
 # Merge
 BELLATRIX_FORK_VERSION: 0x80000071
 BELLATRIX_FORK_EPOCH: 750
-TERMINAL_TOTAL_DIFFICULTY: 100000000000000000000000
+TERMINAL_TOTAL_DIFFICULTY: 50000000000000000
 TERMINAL_BLOCK_HASH: 0x0000000000000000000000000000000000000000000000000000000000000000
 TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH: 18446744073709551615