diff --git a/src/Nethermind.Arbitrum/Config/ArbitrumDynamicSpecProvider.cs b/src/Nethermind.Arbitrum/Config/ArbitrumDynamicSpecProvider.cs
index b6c7ba671..a9b16453e 100644
--- a/src/Nethermind.Arbitrum/Config/ArbitrumDynamicSpecProvider.cs
+++ b/src/Nethermind.Arbitrum/Config/ArbitrumDynamicSpecProvider.cs
@@ -40,6 +40,9 @@ private static void ApplyArbitrumOverrides(ArbitrumReleaseSpec spec, ulong arbos
     {
         spec.ArbOsVersion = arbosVersion;
 
+        // Arbitrum Stylus support: Allow larger code sizes
+        spec.MaxCodeSize = 131072;      // 128 KB (vs Ethereum's 24 KB)
+
         // Shanghai EIPs (ArbOS v11+)
         bool shanghaiEnabled = arbosVersion >= ArbosVersion.Eleven;
         spec.IsEip3651Enabled = shanghaiEnabled;
@@ -76,5 +79,8 @@ private static void ApplyArbitrumOverrides(ArbitrumReleaseSpec spec, ulong arbos
 
         // Disable contract code validation as Arbitrum stores Stylus bytecode
         spec.IsEip3541Enabled = false;
+
+        // Arbitrum supports larger contracts than Ethereum (128KB+ for Stylus)
+        spec.IsEip170Enabled = false;
     }
 }