diff --git a/params/config_arbitrum.go b/params/config_arbitrum.go
index f9362784eb..7ca6983f83 100644
--- a/params/config_arbitrum.go
+++ b/params/config_arbitrum.go
@@ -44,7 +44,7 @@ const ArbosVersion_FixRedeemGas = ArbosVersion_11
 const ArbosVersion_Stylus = ArbosVersion_30
 const ArbosVersion_StylusFixes = ArbosVersion_31
 const ArbosVersion_StylusChargingFixes = ArbosVersion_32
-const MaxArbosVersionSupported = ArbosVersion_50
+const MaxArbosVersionSupported = ArbosVersion_40
 const MaxDebugArbosVersionSupported = ArbosVersion_50
 const ArbosVersion_Dia = ArbosVersion_50