diff --git a/params/config_arbitrum.go b/params/config_arbitrum.go
index e7699b19c4e8..344d8348d991 100644
--- a/params/config_arbitrum.go
+++ b/params/config_arbitrum.go
@@ -105,7 +105,7 @@ func ArbitrumDevTestParams() ArbitrumChainParams {
 		EnableArbOS:               true,
 		AllowDebugPrecompiles:     true,
 		DataAvailabilityCommittee: false,
-		InitialArbOSVersion:       3,
+		InitialArbOSVersion:       5,
 		InitialChainOwner:         common.Address{},
 	}
 }
@@ -115,7 +115,7 @@ func ArbitrumDevTestDASParams() ArbitrumChainParams {
 		EnableArbOS:               true,
 		AllowDebugPrecompiles:     true,
 		DataAvailabilityCommittee: true,
-		InitialArbOSVersion:       3,
+		InitialArbOSVersion:       5,
 		InitialChainOwner:         common.Address{},
 	}
 }