diff --git a/common/eth2_network_config/built_in_network_configs/holesky/config.yaml b/common/eth2_network_config/built_in_network_configs/holesky/config.yaml
index d0b61422e06..e5f38b8c9b5 100644
--- a/common/eth2_network_config/built_in_network_configs/holesky/config.yaml
+++ b/common/eth2_network_config/built_in_network_configs/holesky/config.yaml
@@ -35,7 +35,7 @@ DENEB_FORK_VERSION: 0x05017000
 DENEB_FORK_EPOCH: 29696
 # Electra
 ELECTRA_FORK_VERSION: 0x06017000
-ELECTRA_FORK_EPOCH: 18446744073709551615
+ELECTRA_FORK_EPOCH: 115968
 # Fulu
 FULU_FORK_VERSION: 0x07017000
 FULU_FORK_EPOCH: 18446744073709551615
@@ -127,6 +127,18 @@ BLOB_SIDECAR_SUBNET_COUNT: 6
 # `uint64(6)`
 MAX_BLOBS_PER_BLOCK: 6
 
+# Electra
+# 2**7 * 10**9 (= 128,000,000,000)
+MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA: 128000000000
+# 2**8 * 10**9 (= 256,000,000,000)
+MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT: 256000000000
+# `9`
+BLOB_SIDECAR_SUBNET_COUNT_ELECTRA: 9
+# `uint64(9)`
+MAX_BLOBS_PER_BLOCK_ELECTRA: 9
+# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA
+MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152
+
 # DAS
 NUMBER_OF_COLUMNS: 128
 NUMBER_OF_CUSTODY_GROUPS: 128
diff --git a/common/eth2_network_config/built_in_network_configs/sepolia/config.yaml b/common/eth2_network_config/built_in_network_configs/sepolia/config.yaml
index 7564d8f0f68..af783322055 100644
--- a/common/eth2_network_config/built_in_network_configs/sepolia/config.yaml
+++ b/common/eth2_network_config/built_in_network_configs/sepolia/config.yaml
@@ -36,6 +36,10 @@ CAPELLA_FORK_EPOCH: 56832
 DENEB_FORK_VERSION: 0x90000073
 DENEB_FORK_EPOCH: 132608
 
+# Electra
+ELECTRA_FORK_VERSION: 0x90000074
+ELECTRA_FORK_EPOCH: 222464
+
 # Time parameters
 # ---------------------------------------------------------------
 # 12 seconds
@@ -73,6 +77,8 @@ PROPOSER_SCORE_BOOST: 40
 REORG_HEAD_WEIGHT_THRESHOLD: 20
 # 160%
 REORG_PARENT_WEIGHT_THRESHOLD: 160
+# `2` epochs
+REORG_MAX_EPOCHS_SINCE_FINALIZATION: 2
 
 # Deposit contract
 # ---------------------------------------------------------------
@@ -122,6 +128,18 @@ BLOB_SIDECAR_SUBNET_COUNT: 6
 # `uint64(6)`
 MAX_BLOBS_PER_BLOCK: 6
 
+# Electra
+# 2**7 * 10**9 (= 128,000,000,000)
+MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA: 128000000000
+# 2**8 * 10**9 (= 256,000,000,000)
+MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT: 256000000000
+# `9`
+BLOB_SIDECAR_SUBNET_COUNT_ELECTRA: 9
+# `uint64(9)`
+MAX_BLOBS_PER_BLOCK_ELECTRA: 9
+# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA
+MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152
+
 # DAS
 NUMBER_OF_COLUMNS: 128
 NUMBER_OF_CUSTODY_GROUPS: 128