diff --git a/erigon-lib/chain/chain_config.go b/erigon-lib/chain/chain_config.go
index cab6b90cac9..b02068b123f 100644
--- a/erigon-lib/chain/chain_config.go
+++ b/erigon-lib/chain/chain_config.go
@@ -32,8 +32,8 @@ import (
 // that any network, identified by its genesis block, can have its own
 // set of configuration options.
 type Config struct {
-	ChainName string
-	ChainID   *big.Int `json:"chainId"` // chainId identifies the current chain and is used for replay protection
+	ChainName string   `json:"chainName"` // chain name, eg: mainnet, sepolia, bor-mainnet
+	ChainID   *big.Int `json:"chainId"`   // chainId identifies the current chain and is used for replay protection
 
 	Consensus ConsensusName `json:"consensus,omitempty"` // aura, ethash or clique
 
diff --git a/params/chainspecs/amoy.json b/params/chainspecs/amoy.json
index b88260781b7..b753f752858 100644
--- a/params/chainspecs/amoy.json
+++ b/params/chainspecs/amoy.json
@@ -1,5 +1,5 @@
 {
-    "ChainName": "amoy",
+    "chainName": "amoy",
     "chainId": 80002,
     "consensus": "bor",
     "homesteadBlock": 0,
diff --git a/params/chainspecs/bor-devnet.json b/params/chainspecs/bor-devnet.json
index a032cd8a96a..3cbdb93a2a0 100644
--- a/params/chainspecs/bor-devnet.json
+++ b/params/chainspecs/bor-devnet.json
@@ -1,5 +1,5 @@
 {
-  "ChainName": "bor-devnet",
+  "chainName": "bor-devnet",
   "chainId": 1337,
   "consensus": "bor",
   "homesteadBlock": 0,
diff --git a/params/chainspecs/bor-mainnet.json b/params/chainspecs/bor-mainnet.json
index ec487e571e5..8bbfccffc6e 100644
--- a/params/chainspecs/bor-mainnet.json
+++ b/params/chainspecs/bor-mainnet.json
@@ -1,5 +1,5 @@
 {
-  "ChainName": "bor-mainnet",
+  "chainName": "bor-mainnet",
   "chainId": 137,
   "consensus": "bor",
   "homesteadBlock": 0,
diff --git a/params/chainspecs/chiado.json b/params/chainspecs/chiado.json
index 7ed187fc4d4..72b7a99682a 100644
--- a/params/chainspecs/chiado.json
+++ b/params/chainspecs/chiado.json
@@ -1,5 +1,5 @@
 {
-  "ChainName": "chiado",
+  "chainName": "chiado",
   "chainId": 10200,
   "consensus": "aura",
   "homesteadBlock": 0,
diff --git a/params/chainspecs/gnosis.json b/params/chainspecs/gnosis.json
index 8a4756514d5..834ed7e6dfd 100644
--- a/params/chainspecs/gnosis.json
+++ b/params/chainspecs/gnosis.json
@@ -1,5 +1,5 @@
 {
-  "ChainName": "gnosis",
+  "chainName": "gnosis",
   "chainId": 100,
   "consensus": "aura",
   "homesteadBlock": 0,
diff --git a/params/chainspecs/goerli.json b/params/chainspecs/goerli.json
index b419c2c2ad2..f8839fb6cd1 100644
--- a/params/chainspecs/goerli.json
+++ b/params/chainspecs/goerli.json
@@ -1,5 +1,5 @@
 {
-  "ChainName": "goerli",
+  "chainName": "goerli",
   "chainId": 5,
   "consensus": "clique",
   "homesteadBlock": 0,
diff --git a/params/chainspecs/mainnet.json b/params/chainspecs/mainnet.json
index 91ef377d35d..7d73ec6470b 100644
--- a/params/chainspecs/mainnet.json
+++ b/params/chainspecs/mainnet.json
@@ -1,5 +1,5 @@
 {
-  "ChainName": "mainnet",
+  "chainName": "mainnet",
   "chainId": 1,
   "consensus": "ethash",
   "homesteadBlock": 1150000,
diff --git a/params/chainspecs/mumbai.json b/params/chainspecs/mumbai.json
index 0222a381bfb..6da0a68c4c5 100644
--- a/params/chainspecs/mumbai.json
+++ b/params/chainspecs/mumbai.json
@@ -1,5 +1,5 @@
 {
-  "ChainName": "mumbai",
+  "chainName": "mumbai",
   "chainId": 80001,
   "consensus": "bor",
   "homesteadBlock": 0,
diff --git a/params/chainspecs/sepolia.json b/params/chainspecs/sepolia.json
index c328e70b6e0..e5ffd230325 100644
--- a/params/chainspecs/sepolia.json
+++ b/params/chainspecs/sepolia.json
@@ -1,5 +1,5 @@
 {
-  "ChainName": "sepolia",
+  "chainName": "sepolia",
   "chainId": 11155111,
   "consensus": "ethash",
   "homesteadBlock": 0,