diff --git a/configs/mainnet/lightclient_patch.yaml b/configs/mainnet/lightclient_patch.yaml
index 1996a063f7..64c05a7204 100644
--- a/configs/mainnet/lightclient_patch.yaml
+++ b/configs/mainnet/lightclient_patch.yaml
@@ -2,9 +2,20 @@
 
 CONFIG_NAME: "mainnet"
 
+# Misc
 # ---------------------------------------------------------------
-
 # 2**10 (=1,024)
 SYNC_COMMITTEE_SIZE: 1024
 # 2**6 (=64)
 SYNC_COMMITTEE_PUBKEY_AGGREGATES_SIZE: 64
+
+
+# Time parameters
+# ---------------------------------------------------------------
+# 2**8 (= 256)
+EPOCHS_PER_SYNC_COMMITTEE_PERIOD: 256
+
+
+# Signature domains
+# ---------------------------------------------------------------
+DOMAIN_SYNC_COMMITTEE: 0x07000000
diff --git a/configs/minimal/lightclient_patch.yaml b/configs/minimal/lightclient_patch.yaml
index 62d0d06f79..ba1179a2b5 100644
--- a/configs/minimal/lightclient_patch.yaml
+++ b/configs/minimal/lightclient_patch.yaml
@@ -2,7 +2,20 @@
 
 CONFIG_NAME: "minimal"
 
+# Misc
 # ---------------------------------------------------------------
-
+# [customized]
 SYNC_COMMITTEE_SIZE: 64
+# [customized]
 SYNC_COMMITTEE_PUBKEY_AGGREGATES_SIZE: 16
+
+
+# Time parameters
+# ---------------------------------------------------------------
+# 2**8 (= 256)
+EPOCHS_PER_SYNC_COMMITTEE_PERIOD: 256
+
+
+# Signature domains
+# ---------------------------------------------------------------
+DOMAIN_SYNC_COMMITTEE: 0x07000000
diff --git a/specs/lightclient/beacon-chain.md b/specs/lightclient/beacon-chain.md
index eb5922f93c..6b1ee916bc 100644
--- a/specs/lightclient/beacon-chain.md
+++ b/specs/lightclient/beacon-chain.md
@@ -9,6 +9,7 @@
 - [Introduction](#introduction)
 - [Constants](#constants)
 - [Configuration](#configuration)
+  - [Constants](#constants-1)
   - [Misc](#misc)
   - [Time parameters](#time-parameters)
   - [Domain types](#domain-types)
@@ -47,13 +48,18 @@ This is a standalone beacon chain patch adding light client support via sync com
 
 ## Configuration
 
+### Constants
+
+| Name | Value |
+| - | - |
+| `G2_POINT_AT_INFINITY` | `BLSSignature(b'\xc0' + b'\x00' * 95)` |
+
 ### Misc
 
 | Name | Value |
 | - | - | 
 | `SYNC_COMMITTEE_SIZE` | `uint64(2**10)` (= 1024) |
 | `SYNC_COMMITTEE_PUBKEY_AGGREGATES_SIZE` | `uint64(2**6)` (= 64) |
-| `G2_POINT_AT_INFINITY` | `BLSSignature(b'\xc0' + b'\x00' * 95)` |
 
 ### Time parameters