diff --git a/packages/config/src/chainConfig/networks/holesky.ts b/packages/config/src/chainConfig/networks/holesky.ts
index 18f356d6bc03..632b7fea8ec2 100644
--- a/packages/config/src/chainConfig/networks/holesky.ts
+++ b/packages/config/src/chainConfig/networks/holesky.ts
@@ -33,6 +33,9 @@ export const holeskyChainConfig: ChainConfig = {
   // Deneb
   DENEB_FORK_VERSION: b("0x05017000"),
   DENEB_FORK_EPOCH: 29696,
+  // Electra
+  ELECTRA_FORK_VERSION: b("0x06017000"),
+  ELECTRA_FORK_EPOCH: 115968,
 
   // # 28,000,000,000 Gwei to ensure quicker ejection
   EJECTION_BALANCE: 28000000000,
diff --git a/packages/config/src/chainConfig/networks/sepolia.ts b/packages/config/src/chainConfig/networks/sepolia.ts
index f47d73436702..f6629ac70755 100644
--- a/packages/config/src/chainConfig/networks/sepolia.ts
+++ b/packages/config/src/chainConfig/networks/sepolia.ts
@@ -33,6 +33,9 @@ export const sepoliaChainConfig: ChainConfig = {
   // Deneb
   DENEB_FORK_VERSION: b("0x90000073"),
   DENEB_FORK_EPOCH: 132608,
+  // Electra
+  ELECTRA_FORK_VERSION: b("0x90000074"),
+  ELECTRA_FORK_EPOCH: 222464,
 
   // Deposit contract
   // ---------------------------------------------------------------
diff --git a/packages/validator/test/unit/utils/interopConfigs.ts b/packages/validator/test/unit/utils/interopConfigs.ts
index a575b796e095..79c10594b007 100644
--- a/packages/validator/test/unit/utils/interopConfigs.ts
+++ b/packages/validator/test/unit/utils/interopConfigs.ts
@@ -121,7 +121,7 @@ export const lighthouseHoleskyConfig = {
   DOMAIN_SYNC_COMMITTEE_SELECTION_PROOF: "0x08000000",
   DOMAIN_BLS_TO_EXECUTION_CHANGE: "0x0A000000",
   MAX_EFFECTIVE_BALANCE_ELECTRA: "2048000000000",
-  MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA: "65536",
+  MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA: "4096",
   MIN_ACTIVATION_BALANCE: "32000000000",
   PENDING_DEPOSITS_LIMIT: "134217728",
   PENDING_PARTIAL_WITHDRAWALS_LIMIT: "134217728",
@@ -219,7 +219,7 @@ export const prysmHoleskyConfig = {
   MIN_SLASHING_PENALTY_QUOTIENT: "128",
   MIN_SLASHING_PENALTY_QUOTIENT_ALTAIR: "64",
   MIN_SLASHING_PENALTY_QUOTIENT_BELLATRIX: "32",
-  MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA: "65536",
+  MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA: "4096",
   MIN_SYNC_COMMITTEE_PARTICIPANTS: "1",
   MIN_VALIDATOR_WITHDRAWABILITY_DELAY: "256",
   NODE_ID_BITS: "256",
@@ -357,7 +357,7 @@ export const tekuHoleskyConfig = {
   DOMAIN_DEPOSIT: "0x03000000",
   DOMAIN_CONTRIBUTION_AND_PROOF: "0x09000000",
   UPDATE_TIMEOUT: "8192",
-  ELECTRA_FORK_EPOCH: "18446744073709551615",
+  ELECTRA_FORK_EPOCH: "115968",
   SYNC_COMMITTEE_BRANCH_LENGTH: "5",
   DEPOSIT_CHAIN_ID: "17000",
   MAX_BLOB_COMMITMENTS_PER_BLOCK: "4096",
@@ -401,7 +401,7 @@ export const tekuHoleskyConfig = {
   CHURN_LIMIT_QUOTIENT: "65536",
   BLS_WITHDRAWAL_PREFIX: "0x00",
   MAX_EFFECTIVE_BALANCE_ELECTRA: "2048000000000",
-  MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA: "65536",
+  MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA: "4096",
   MIN_ACTIVATION_BALANCE: "32000000000",
   PENDING_DEPOSITS_LIMIT: "134217728",
   PENDING_PARTIAL_WITHDRAWALS_LIMIT: "134217728",
@@ -544,7 +544,7 @@ export const nimbusHoleskyConfig = {
   TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE: "16",
   SYNC_COMMITTEE_SUBNET_COUNT: "4",
   MAX_EFFECTIVE_BALANCE_ELECTRA: "2048000000000",
-  MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA: "65536",
+  MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA: "4096",
   MIN_ACTIVATION_BALANCE: "32000000000",
   PENDING_DEPOSITS_LIMIT: "134217728",
   PENDING_PARTIAL_WITHDRAWALS_LIMIT: "134217728",