diff --git a/config/default_config.json b/config/default_config.json
index bc6e12eea..b13bce9b3 100644
--- a/config/default_config.json
+++ b/config/default_config.json
@@ -50,29 +50,29 @@
     "value": 0
   },
   "gateway_config.stateless_tx_validator_config.max_bytecode_size": {
-    "description": "Validates that a transaction has bytecode size less than or equal to this value.",
+    "description": "Limitation of contract bytecode size.",
     "privacy": "Public",
-    "value": 0
+    "value": 81920
   },
   "gateway_config.stateless_tx_validator_config.max_calldata_length": {
-    "description": "Validates that a transaction has calldata length less than or equal to this value.",
+    "description": "Limitation of calldata length.",
     "privacy": "Public",
-    "value": 0
+    "value": 4000
   },
   "gateway_config.stateless_tx_validator_config.max_raw_class_size": {
-    "description": "Validates that a transaction has raw class size less than or equal to this value.",
+    "description": "Limitation of contract class object size.",
     "privacy": "Public",
-    "value": 0
+    "value": 4089446
   },
   "gateway_config.stateless_tx_validator_config.max_sierra_version.major": {
     "description": "The major version of the configuration.",
     "privacy": "Public",
-    "value": 18446744073709551615
+    "value": 1
   },
   "gateway_config.stateless_tx_validator_config.max_sierra_version.minor": {
     "description": "The minor version of the configuration.",
     "privacy": "Public",
-    "value": 18446744073709551615
+    "value": 5
   },
   "gateway_config.stateless_tx_validator_config.max_sierra_version.patch": {
     "description": "The patch version of the configuration.",
@@ -80,19 +80,19 @@
     "value": 18446744073709551615
   },
   "gateway_config.stateless_tx_validator_config.max_signature_length": {
-    "description": "Validates that a transaction has signature length less than or equal to this value.",
+    "description": "Limitation of signature length.",
     "privacy": "Public",
-    "value": 0
+    "value": 4000
   },
   "gateway_config.stateless_tx_validator_config.min_sierra_version.major": {
     "description": "The major version of the configuration.",
     "privacy": "Public",
-    "value": 0
+    "value": 1
   },
   "gateway_config.stateless_tx_validator_config.min_sierra_version.minor": {
     "description": "The minor version of the configuration.",
     "privacy": "Public",
-    "value": 0
+    "value": 1
   },
   "gateway_config.stateless_tx_validator_config.min_sierra_version.patch": {
     "description": "The patch version of the configuration.",
@@ -102,7 +102,7 @@
   "gateway_config.stateless_tx_validator_config.validate_non_zero_l1_gas_fee": {
     "description": "If true, validates that a transaction has non-zero L1 resource bounds.",
     "privacy": "Public",
-    "value": false
+    "value": true
   },
   "gateway_config.stateless_tx_validator_config.validate_non_zero_l2_gas_fee": {
     "description": "If true, validates that a transaction has non-zero L2 resource bounds.",
diff --git a/crates/gateway/src/config.rs b/crates/gateway/src/config.rs
index 5d659a7f0..396fc70d1 100644
--- a/crates/gateway/src/config.rs
+++ b/crates/gateway/src/config.rs
@@ -81,14 +81,14 @@ pub struct StatelessTransactionValidatorConfig {
 impl Default for StatelessTransactionValidatorConfig {
     fn default() -> Self {
         StatelessTransactionValidatorConfig {
-            validate_non_zero_l1_gas_fee: false,
+            validate_non_zero_l1_gas_fee: true,
             validate_non_zero_l2_gas_fee: false,
-            max_calldata_length: 0,
-            max_signature_length: 0,
-            max_bytecode_size: 0,
-            max_raw_class_size: 0,
-            min_sierra_version: VersionId::MIN,
-            max_sierra_version: VersionId::MAX,
+            max_calldata_length: 4000,
+            max_signature_length: 4000,
+            max_bytecode_size: 81920,
+            max_raw_class_size: 4089446,
+            min_sierra_version: VersionId { major: 1, minor: 1, patch: 0 },
+            max_sierra_version: VersionId { major: 1, minor: 5, patch: usize::MAX },
         }
     }
 }
@@ -111,27 +111,25 @@ impl SerializeConfig for StatelessTransactionValidatorConfig {
             ser_param(
                 "max_signature_length",
                 &self.max_signature_length,
-                "Validates that a transaction has signature length less than or equal to this \
-                 value.",
+                "Limitation of signature length.",
                 ParamPrivacyInput::Public,
             ),
             ser_param(
                 "max_calldata_length",
                 &self.max_calldata_length,
-                "Validates that a transaction has calldata length less than or equal to this \
-                 value.",
+                "Limitation of calldata length.",
                 ParamPrivacyInput::Public,
             ),
             ser_param(
                 "max_bytecode_size",
                 &self.max_bytecode_size,
-                "Validates that a transaction has bytecode size less than or equal to this value.",
+                "Limitation of contract bytecode size.",
                 ParamPrivacyInput::Public,
             ),
             ser_param(
                 "max_raw_class_size",
                 &self.max_raw_class_size,
-                "Validates that a transaction has raw class size less than or equal to this value.",
+                "Limitation of contract class object size.",
                 ParamPrivacyInput::Public,
             ),
         ]);