diff --git a/base/mainnet.go b/base/mainnet.go
index dbfaae0..1b7ed27 100644
--- a/base/mainnet.go
+++ b/base/mainnet.go
@@ -62,12 +62,12 @@ const (
 	CLOUDTX  uint64 = 44
 	ZKSYNC   uint64 = 45
 	XINFIN   uint64 = 46
+	ONTEVM   uint64 = 47
 
 	// Invalid chain IDs
 	RINKEBY    uint64 = 1000000
 	PIXIE      uint64 = 2000000
 	BCSPALETTE uint64 = 1001001
-	ONTEVM     uint64 = 1001333
 	FLOW       uint64 = 1000444
 	PLT2       uint64 = 1000108
 
diff --git a/base/testnet.go b/base/testnet.go
index 4a0e059..0378e69 100644
--- a/base/testnet.go
+++ b/base/testnet.go
@@ -50,7 +50,7 @@ const (
 	BYTOM    uint64 = 701
 	HARMONY  uint64 = 800
 	KCC      uint64 = 900
-	ONTEVM   uint64 = 333
+	ONTEVM   uint64 = 334
 	MILKO    uint64 = 810
 	FLOW     uint64 = 910
 	KAVA     uint64 = 920