diff --git a/arbos/arbosState/arbosstate.go b/arbos/arbosState/arbosstate.go
index 91c2207aaef..81a884e4504 100644
--- a/arbos/arbosState/arbosstate.go
+++ b/arbos/arbosState/arbosstate.go
@@ -41,28 +41,29 @@ import (
 // persisted beyond the end of the test.)
 
 type ArbosState struct {
-	arbosVersion                  uint64                      // version of the ArbOS storage format and semantics
-	maxArbosVersionSupported      uint64                      // maximum ArbOS version supported by this code
-	maxDebugArbosVersionSupported uint64                      // maximum ArbOS version supported by this code in debug mode
-	upgradeVersion                storage.StorageBackedUint64 // version we're planning to upgrade to, or 0 if not planning to upgrade
-	upgradeTimestamp              storage.StorageBackedUint64 // when to do the planned upgrade
-	networkFeeAccount             storage.StorageBackedAddress
-	l1PricingState                *l1pricing.L1PricingState
-	l2PricingState                *l2pricing.L2PricingState
-	retryableState                *retryables.RetryableState
-	addressTable                  *addressTable.AddressTable
-	chainOwners                   *addressSet.AddressSet
-	sendMerkle                    *merkleAccumulator.MerkleAccumulator
-	programs                      *programs.Programs
-	blockhashes                   *blockhash.Blockhashes
-	chainId                       storage.StorageBackedBigInt
-	chainConfig                   storage.StorageBackedBytes
-	genesisBlockNum               storage.StorageBackedUint64
-	infraFeeAccount               storage.StorageBackedAddress
-	brotliCompressionLevel        storage.StorageBackedUint64 // brotli compression level used for pricing
-	backingStorage                *storage.Storage
-	Burner                        burn.Burner
-}
+	arbosVersion           uint64                      // version of the ArbOS storage format and semantics
+	upgradeVersion         storage.StorageBackedUint64 // version we're planning to upgrade to, or 0 if not planning to upgrade
+	upgradeTimestamp       storage.StorageBackedUint64 // when to do the planned upgrade
+	networkFeeAccount      storage.StorageBackedAddress
+	l1PricingState         *l1pricing.L1PricingState
+	l2PricingState         *l2pricing.L2PricingState
+	retryableState         *retryables.RetryableState
+	addressTable           *addressTable.AddressTable
+	chainOwners            *addressSet.AddressSet
+	sendMerkle             *merkleAccumulator.MerkleAccumulator
+	programs               *programs.Programs
+	blockhashes            *blockhash.Blockhashes
+	chainId                storage.StorageBackedBigInt
+	chainConfig            storage.StorageBackedBytes
+	genesisBlockNum        storage.StorageBackedUint64
+	infraFeeAccount        storage.StorageBackedAddress
+	brotliCompressionLevel storage.StorageBackedUint64 // brotli compression level used for pricing
+	backingStorage         *storage.Storage
+	Burner                 burn.Burner
+}
+
+const MaxArbosVersionSupported uint64 = params.ArbosVersion_StylusFixes
+const MaxDebugArbosVersionSupported uint64 = params.ArbosVersion_StylusActivationFix
 
 var ErrUninitializedArbOS = errors.New("ArbOS uninitialized")
 var ErrAlreadyInitialized = errors.New("ArbOS is already initialized")
@@ -78,8 +79,6 @@ func OpenArbosState(stateDB vm.StateDB, burner burn.Burner) (*ArbosState, error)
 	}
 	return &ArbosState{
 		arbosVersion,
-		31,
-		31,
 		backingStorage.OpenStorageBackedUint64(uint64(upgradeVersionOffset)),
 		backingStorage.OpenStorageBackedUint64(uint64(upgradeTimestampOffset)),
 		backingStorage.OpenStorageBackedAddress(uint64(networkFeeAccountOffset)),
@@ -416,14 +415,6 @@ func (state *ArbosState) RetryableState() *retryables.RetryableState {
 	return state.retryableState
 }
 
-func (state *ArbosState) MaxArbosVersionSupported() uint64 {
-	return state.maxArbosVersionSupported
-}
-
-func (state *ArbosState) MaxDebugArbosVersionSupported() uint64 {
-	return state.maxDebugArbosVersionSupported
-}
-
 func (state *ArbosState) L1PricingState() *l1pricing.L1PricingState {
 	return state.l1PricingState
 }
diff --git a/cmd/nitro/init.go b/cmd/nitro/init.go
index fc59f2d231a..07c74cb802f 100644
--- a/cmd/nitro/init.go
+++ b/cmd/nitro/init.go
@@ -354,12 +354,12 @@ func validateBlockChain(blockChain *core.BlockChain, chainConfig *params.ChainCo
 	}
 	// Make sure we don't allow accidentally downgrading ArbOS
 	if chainConfig.DebugMode() {
-		if currentArbosState.ArbOSVersion() > currentArbosState.MaxDebugArbosVersionSupported() {
-			return fmt.Errorf("attempted to launch node in debug mode with ArbOS version %v on ArbOS state with version %v", currentArbosState.MaxDebugArbosVersionSupported(), currentArbosState.ArbOSVersion())
+		if currentArbosState.ArbOSVersion() > arbosState.MaxDebugArbosVersionSupported {
+			return fmt.Errorf("attempted to launch node in debug mode with ArbOS version %v on ArbOS state with version %v", arbosState.MaxDebugArbosVersionSupported, currentArbosState.ArbOSVersion())
 		}
 	} else {
-		if currentArbosState.ArbOSVersion() > currentArbosState.MaxArbosVersionSupported() {
-			return fmt.Errorf("attempted to launch node with ArbOS version %v on ArbOS state with version %v", currentArbosState.MaxArbosVersionSupported(), currentArbosState.ArbOSVersion())
+		if currentArbosState.ArbOSVersion() > arbosState.MaxArbosVersionSupported {
+			return fmt.Errorf("attempted to launch node with ArbOS version %v on ArbOS state with version %v", arbosState.MaxArbosVersionSupported, currentArbosState.ArbOSVersion())
 		}
 
 	}