diff --git a/beacon_chain/el/engine_api_conversions.nim b/beacon_chain/el/engine_api_conversions.nim
index 54939f9c8..9bcf6a06a 100644
--- a/beacon_chain/el/engine_api_conversions.nim
+++ b/beacon_chain/el/engine_api_conversions.nim
@@ -329,7 +329,8 @@ func asConsensusType*(rpcExecutionPayload: ExecutionPayloadV4):
     withdrawals: List[capella.Withdrawal, MAX_WITHDRAWALS_PER_PAYLOAD].init(
       mapIt(rpcExecutionPayload.withdrawals, it.asConsensusWithdrawal)),
     blob_gas_used: rpcExecutionPayload.blobGasUsed.uint64,
-    excess_blob_gas: rpcExecutionPayload.excessBlobGas.uint64)
+    excess_blob_gas: rpcExecutionPayload.excessBlobGas.uint64,
+    system_logs_root: rpcExecutionPayload.systemLogsRoot.asEth2Digest)
 
 func asConsensusType*(payload: engine_api.GetPayloadV4Response):
     electra.ExecutionPayloadForSigning =
@@ -609,4 +610,5 @@ func asEngineExecutionPayload*(blockBody: electra.BeaconBlockBody):
     withdrawalRequests: mapIt(
       blockBody.execution_requests.withdrawals, it.getWithdrawalRequest),
     consolidationRequests: mapIt(
-      blockBody.execution_requests.consolidations, it.getConsolidationRequest))
+      blockBody.execution_requests.consolidations, it.getConsolidationRequest),
+    systemLogsRoot: executionPayload.system_logs_root.asBlockHash)
diff --git a/beacon_chain/libnimbus_lc/libnimbus_lc.nim b/beacon_chain/libnimbus_lc/libnimbus_lc.nim
index 7ae000dae..c35cff545 100644
--- a/beacon_chain/libnimbus_lc/libnimbus_lc.nim
+++ b/beacon_chain/libnimbus_lc/libnimbus_lc.nim
@@ -1173,6 +1173,21 @@ func ETHExecutionPayloadHeaderGetExcessBlobGas(
   ## * Excess blob gas.
   execution[].excess_blob_gas.cint
 
+func ETHExecutionPayloadHeaderGetSystemLogsRoot(
+    execution: ptr ExecutionPayloadHeader): ptr Eth2Digest {.exported.} =
+  ## Obtains the system logs root of a given execution payload header.
+  ##
+  ## * The returned value is allocated in the given execution payload header.
+  ##   It must neither be released nor written to, and the execution payload
+  ##   header must not be released while the returned value is in use.
+  ##
+  ## Parameters:
+  ## * `execution` - Execution payload header.
+  ##
+  ## Returns:
+  ## * Execution system logs root.
+  addr execution[].system_logs_root
+
 type
   ETHWithdrawal = object
     index: uint64
@@ -1261,16 +1276,21 @@ proc ETHExecutionBlockHeaderCreateFromJson(
       data.withdrawals.isSome or data.withdrawalsRoot.isSome or
       data.blobGasUsed.isSome or data.excessBlobGas.isSome or
       data.depositRequests.isSome or data.withdrawalRequests.isSome or
-      data.consolidationRequests.isSome or data.requestsRoot.isSome):
+      data.consolidationRequests.isSome or data.requestsRoot.isSome or
+      data.systemLogsRoot.isSome):
     return nil
   if data.withdrawalsRoot.isNone and (
       data.blobGasUsed.isSome or data.excessBlobGas.isSome or
       data.depositRequests.isSome or data.withdrawalRequests.isSome or
-      data.consolidationRequests.isSome or data.requestsRoot.isSome):
+      data.consolidationRequests.isSome or data.requestsRoot.isSome or
+      data.systemLogsRoot.isSome):
     return nil
   if data.blobGasUsed.isNone and (
       data.depositRequests.isSome or data.withdrawalRequests.isSome or
-      data.consolidationRequests.isSome or data.requestsRoot.isSome):
+      data.consolidationRequests.isSome or data.requestsRoot.isSome or
+      data.systemLogsRoot.isSome):
+    return nil
+  if data.depositRequests.isNone and data.systemLogsRoot.isSome:
     return nil
   if data.withdrawals.isSome != data.withdrawalsRoot.isSome:
     return nil
@@ -1327,6 +1347,11 @@ proc ETHExecutionBlockHeaderCreateFromJson(
     requestsRoot:
       if data.requestsRoot.isSome:
         Opt.some(data.requestsRoot.get.asEth2Digest.to(Hash32))
+      else:
+        Opt.none(ExecutionHash256),
+    systemLogsRoot:
+      if data.systemLogsRoot.isSome:
+        Opt.some(data.systemLogsRoot.get.asEth2Digest.to(Hash32))
       else:
         Opt.none(ExecutionHash256))
   if rlpHash(blockHeader) != executionHash[]:
diff --git a/beacon_chain/libnimbus_lc/test_libnimbus_lc.c b/beacon_chain/libnimbus_lc/test_libnimbus_lc.c
index c9fed9b19..3888d04cc 100644
--- a/beacon_chain/libnimbus_lc/test_libnimbus_lc.c
+++ b/beacon_chain/libnimbus_lc/test_libnimbus_lc.c
@@ -255,6 +255,11 @@ static void visualizeHeader(const ETHLightClientHeader *header, const ETHConsens
 
     int executionExcessBlobGas = ETHExecutionPayloadHeaderGetExcessBlobGas(execution);
     printf("    - excess_blob_gas: %d\n", executionExcessBlobGas);
+
+    const ETHRoot *executionSystemLogsRoot = ETHExecutionPayloadHeaderGetSystemLogsRoot(execution);
+    printf("    - system_logs_root: ");
+    printHexString(executionSystemLogsRoot, sizeof *executionSystemLogsRoot);
+    printf("\n");
 }
 
 ETH_RESULT_USE_CHECK
diff --git a/beacon_chain/spec/datatypes/electra.nim b/beacon_chain/spec/datatypes/electra.nim
index 59686feb2..4815c14e3 100644
--- a/beacon_chain/spec/datatypes/electra.nim
+++ b/beacon_chain/spec/datatypes/electra.nim
@@ -133,6 +133,7 @@ type
     withdrawals*: List[Withdrawal, MAX_WITHDRAWALS_PER_PAYLOAD]
     blob_gas_used*: uint64
     excess_blob_gas*: uint64
+    system_logs_root*: Eth2Digest
 
   ExecutionPayloadForSigning* = object
     executionPayload*: ExecutionPayload
@@ -162,6 +163,7 @@ type
     withdrawals_root*: Eth2Digest
     blob_gas_used*: uint64
     excess_blob_gas*: uint64
+    system_logs_root*: Eth2Digest
 
   ExecutePayload* = proc(
     execution_payload: ExecutionPayload): bool {.gcsafe, raises: [].}
@@ -712,7 +714,8 @@ func shortLog*(v: ExecutionPayload): auto =
     num_transactions: len(v.transactions),
     num_withdrawals: len(v.withdrawals),
     blob_gas_used: $(v.blob_gas_used),
-    excess_blob_gas: $(v.excess_blob_gas)
+    excess_blob_gas: $(v.excess_blob_gas),
+    system_logs_root: $(v.system_logs_root)
   )
 
 func kzg_commitment_inclusion_proof_gindex*(
@@ -839,6 +842,10 @@ func is_valid_light_client_header*(
     header: LightClientHeader, cfg: RuntimeConfig): bool =
   let epoch = header.beacon.slot.epoch
 
+  if epoch < cfg.ELECTRA_FORK_EPOCH:
+    if not header.execution.system_logs_root.isZero:
+      return false
+
   if epoch < cfg.DENEB_FORK_EPOCH:
     if header.execution.blob_gas_used != 0 or
         header.execution.excess_blob_gas != 0:
diff --git a/beacon_chain/spec/datatypes/stable.nim b/beacon_chain/spec/datatypes/stable.nim
index f8cb5436c..e4ff7ab84 100644
--- a/beacon_chain/spec/datatypes/stable.nim
+++ b/beacon_chain/spec/datatypes/stable.nim
@@ -147,6 +147,7 @@ type
     withdrawals*: Opt[List[Withdrawal, MAX_WITHDRAWALS_PER_PAYLOAD]]
     blob_gas_used*: Opt[uint64]
     excess_blob_gas*: Opt[uint64]
+    system_logs_root*: Opt[Eth2Digest]
 
   StableExecutionPayloadHeader* {.
       sszStableContainer: MAX_EXECUTION_PAYLOAD_FIELDS.} = object
@@ -171,6 +172,7 @@ type
     withdrawals_root*: Opt[Eth2Digest]
     blob_gas_used*: Opt[uint64]
     excess_blob_gas*: Opt[uint64]
+    system_logs_root*: Opt[Eth2Digest]
 
   StableExecutionRequests* {.
       sszStableContainer: MAX_EXECUTION_REQUESTS_FIELDS.} = object
diff --git a/beacon_chain/spec/forks_light_client.nim b/beacon_chain/spec/forks_light_client.nim
index 11caedd9a..8e9000a4b 100644
--- a/beacon_chain/spec/forks_light_client.nim
+++ b/beacon_chain/spec/forks_light_client.nim
@@ -1231,7 +1231,8 @@ func toElectraLightClientHeader(
       transactions_root: hash_tree_root(payload.transactions),
       withdrawals_root: hash_tree_root(payload.withdrawals),
       blob_gas_used: payload.blob_gas_used,
-      excess_blob_gas: payload.excess_blob_gas),
+      excess_blob_gas: payload.excess_blob_gas,
+      system_logs_root: payload.system_logs_root),
     execution_branch:
       blck.message.body.build_proof(EXECUTION_PAYLOAD_GINDEX_ELECTRA).get)
 
diff --git a/beacon_chain/spec/helpers.nim b/beacon_chain/spec/helpers.nim
index 1e01c91f6..4a4a316a1 100644
--- a/beacon_chain/spec/helpers.nim
+++ b/beacon_chain/spec/helpers.nim
@@ -538,6 +538,11 @@ proc blockToBlockHeader*(blck: ForkyBeaconBlock): ExecutionBlockHeader =
         Opt.some blck.body.execution_requests.computeRequestsTrieRoot()
       else:
         Opt.none(ExecutionHash256)
+    systemLogsRoot =
+      when typeof(payload).kind >= ConsensusFork.Electra:
+        Opt.some payload.system_logs_root.to(Root)
+      else:
+        Opt.none(Root)
 
   ExecutionBlockHeader(
     parentHash            : payload.parent_hash.to(Hash32),
@@ -560,7 +565,8 @@ proc blockToBlockHeader*(blck: ForkyBeaconBlock): ExecutionBlockHeader =
     blobGasUsed           : blobGasUsed,           # EIP-4844
     excessBlobGas         : excessBlobGas,         # EIP-4844
     parentBeaconBlockRoot : parentBeaconBlockRoot, # EIP-4788
-    requestsRoot          : requestsRoot)          # EIP-7685
+    requestsRoot          : requestsRoot,          # EIP-7685
+    systemLogsRoot        : systemLogsRoot)        # Fusaka-Light
 
 proc compute_execution_block_hash*(blck: ForkyBeaconBlock): Eth2Digest =
   rlpHash(blockToBlockHeader(blck)).to(Eth2Digest)
diff --git a/beacon_chain/spec/mev/electra_mev.nim b/beacon_chain/spec/mev/electra_mev.nim
index 4b195494c..611084568 100644
--- a/beacon_chain/spec/mev/electra_mev.nim
+++ b/beacon_chain/spec/mev/electra_mev.nim
@@ -145,7 +145,9 @@ func toSignedBlindedBeaconBlock*(blck: electra.SignedBeaconBlock):
           withdrawals_root:
             hash_tree_root(blck.message.body.execution_payload.withdrawals),
           blob_gas_used: blck.message.body.execution_payload.blob_gas_used,
-          excess_blob_gas: blck.message.body.execution_payload.excess_blob_gas),
+          excess_blob_gas: blck.message.body.execution_payload.excess_blob_gas,
+          system_logs_root:
+            blck.message.body.execution_payload.system_logs_root),
         bls_to_execution_changes: blck.message.body.bls_to_execution_changes,
         blob_kzg_commitments: blck.message.body.blob_kzg_commitments,
         execution_requests: blck.message.body.execution_requests)),
diff --git a/beacon_chain/spec/state_transition_block.nim b/beacon_chain/spec/state_transition_block.nim
index e809d85d5..0cce6e97d 100644
--- a/beacon_chain/spec/state_transition_block.nim
+++ b/beacon_chain/spec/state_transition_block.nim
@@ -1040,7 +1040,8 @@ proc process_execution_payload*(
     transactions_root: hash_tree_root(payload.transactions),
     withdrawals_root: hash_tree_root(payload.withdrawals),
     blob_gas_used: payload.blob_gas_used,
-    excess_blob_gas: payload.excess_blob_gas)
+    excess_blob_gas: payload.excess_blob_gas,
+    system_logs_root: payload.system_logs_root)
 
   ok()
 
diff --git a/vendor/nim-eth b/vendor/nim-eth
index 00c91a1dc..f5017bd2a 160000
--- a/vendor/nim-eth
+++ b/vendor/nim-eth
@@ -1 +1 @@
-Subproject commit 00c91a1dcaf488046bbc9b9fcbd430934312930f
+Subproject commit f5017bd2a2159a94629b2eaeb5aba94d08cab9ce
diff --git a/vendor/nim-web3 b/vendor/nim-web3
index 078727472..09fa93245 160000
--- a/vendor/nim-web3
+++ b/vendor/nim-web3
@@ -1 +1 @@
-Subproject commit 078727472f933fe962c759365a3c2cddf626cc7e
+Subproject commit 09fa93245333c2702815f57bb15bc65ecbc85d14