diff --git a/crates/blockifier/resources/versioned_constants.json b/crates/blockifier/resources/versioned_constants.json
index b03c7aa515..b76d8f7528 100644
--- a/crates/blockifier/resources/versioned_constants.json
+++ b/crates/blockifier/resources/versioned_constants.json
@@ -1,17 +1,20 @@
 {
+    "gateway": {
+        "max_calldata_length": 4000,
+        "max_contract_bytecode_size": 61440
+    },
+    "invoke_tx_max_n_steps": 3000000,
+    "max_recursion_depth": 50,
+    "validate_max_n_steps": 1000000,
     "vm_resource_fee_cost": {
-
-        "bitwise_builtin":0.32,
-        "ec_op_builtin":5.12,
-        "ecdsa_builtin":10.24,
-        "keccak_builtin":10.24,
+        "bitwise_builtin": 0.32,
+        "ec_op_builtin": 5.12,
+        "ecdsa_builtin": 10.24,
+        "keccak_builtin": 10.24,
         "n_steps": 0.005,
         "output_builtin": 0,
         "pedersen_builtin": 0.16,
-        "poseidon_builtin":0.16,
-        "range_check_builtin":0.08
-    },
-    "invoke_tx_max_n_steps": 3000000,
-    "max_recursion_depth": 50,
-    "validate_max_n_steps": 1000000
+        "poseidon_builtin": 0.16,
+        "range_check_builtin": 0.08
+    }
 }
diff --git a/crates/blockifier/src/versioned_constants.rs b/crates/blockifier/src/versioned_constants.rs
index 5af654d47c..0a6c40bf90 100644
--- a/crates/blockifier/src/versioned_constants.rs
+++ b/crates/blockifier/src/versioned_constants.rs
@@ -13,6 +13,9 @@ static DEFAULT_CONSTANTS: Lazy<VersionedConstants> = Lazy::new(|| {
         .expect("Versioned constants json file is malformed")
 });
 
+/// Contains constants for the Blockifier that may vary between versions.
+/// Additional constants in the JSON file, not used by Blockifier but included for transparency, are
+/// automatically ignored during deserialization.
 #[derive(Clone, Debug, Default, Deserialize)]
 pub struct VersionedConstants {
     // Fee related.
diff --git a/crates/native_blockifier/src/py_block_executor.rs b/crates/native_blockifier/src/py_block_executor.rs
index 0759812d2f..75ebbf9bd9 100644
--- a/crates/native_blockifier/src/py_block_executor.rs
+++ b/crates/native_blockifier/src/py_block_executor.rs
@@ -35,9 +35,10 @@ pub struct PyBlockExecutor {
 #[pymethods]
 impl PyBlockExecutor {
     #[new]
-    #[pyo3(signature = (general_config, max_recursion_depth, target_storage_config))]
+    #[pyo3(signature = (general_config, validate_max_n_steps, max_recursion_depth, target_storage_config))]
     pub fn create(
         general_config: PyGeneralConfig,
+        validate_max_n_steps: u32,
         max_recursion_depth: usize,
         target_storage_config: StorageConfig,
     ) -> Self {
@@ -48,6 +49,7 @@ impl PyBlockExecutor {
 
         let versioned_constants = VersionedConstants {
             max_recursion_depth,
+            validate_max_n_steps,
             ..VersionedConstants::latest_constants().clone()
         };
 
diff --git a/crates/native_blockifier/src/py_validator.rs b/crates/native_blockifier/src/py_validator.rs
index 20714ea630..a57c065f69 100644
--- a/crates/native_blockifier/src/py_validator.rs
+++ b/crates/native_blockifier/src/py_validator.rs
@@ -31,23 +31,24 @@ pub struct PyValidator {
 #[pymethods]
 impl PyValidator {
     #[new]
-    #[pyo3(signature = (general_config, state_reader_proxy, next_block_info, max_recursion_depth, max_nonce_for_validation_skip))]
+    #[pyo3(signature = (general_config, state_reader_proxy, next_block_info, validate_max_n_steps, max_recursion_depth, max_nonce_for_validation_skip))]
     pub fn create(
         general_config: PyGeneralConfig,
         state_reader_proxy: &PyAny,
         next_block_info: PyBlockInfo,
+        validate_max_n_steps: u32,
         max_recursion_depth: usize,
         max_nonce_for_validation_skip: PyFelt,
     ) -> NativeBlockifierResult<Self> {
         let versioned_constants = VersionedConstants {
             max_recursion_depth,
+            validate_max_n_steps,
             ..VersionedConstants::latest_constants().clone()
         };
 
         let tx_executor = TransactionExecutor::new(
             PyStateReader::new(state_reader_proxy),
             &general_config,
-            // TODO(Gilad): add max_validate_n_steps override argument and override here.
             &versioned_constants,
             next_block_info,
             GlobalContractCache::default(),