diff --git a/params/config_arbitrum.go b/params/config_arbitrum.go
index 64a92f9e3d..c10605770d 100644
--- a/params/config_arbitrum.go
+++ b/params/config_arbitrum.go
@@ -39,6 +39,7 @@ const ArbosVersion_32 = uint64(32)
 const ArbosVersion_40 = uint64(40)
 const ArbosVersion_41 = uint64(41)
 const ArbosVersion_50 = uint64(50)
+const ArbosVersion_51 = uint64(51)
 const ArbosVersion_60 = uint64(60)
 
 const ArbosVersion_FixRedeemGas = ArbosVersion_11
@@ -46,8 +47,9 @@ const ArbosVersion_Stylus = ArbosVersion_30
 const ArbosVersion_StylusFixes = ArbosVersion_31
 const ArbosVersion_StylusChargingFixes = ArbosVersion_32
 const MaxArbosVersionSupported = ArbosVersion_50
-const MaxDebugArbosVersionSupported = ArbosVersion_60
+const MaxDebugArbosVersionSupported = ArbosVersion_51
 const ArbosVersion_Dia = ArbosVersion_50
+const ArbosVersion_MultiConstraintFix = ArbosVersion_51
 
 type ArbitrumChainParams struct {
 	EnableArbOS               bool