diff --git a/Cargo.lock b/Cargo.lock
index 0491c040..c8cb0627 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5494,6 +5494,7 @@ dependencies = [
  "cairo-lang-starknet-classes",
  "cairo-vm",
  "hyper",
+ "lazy_static",
  "papyrus_config",
  "pretty_assertions",
  "reqwest",
diff --git a/crates/gateway/Cargo.toml b/crates/gateway/Cargo.toml
index c9514273..decc3bea 100644
--- a/crates/gateway/Cargo.toml
+++ b/crates/gateway/Cargo.toml
@@ -18,6 +18,7 @@ blockifier.workspace = true
 cairo-lang-starknet-classes.workspace = true
 cairo-vm.workspace = true
 hyper.workspace = true
+lazy_static.workspace = true
 papyrus_config.workspace = true
 reqwest.workspace = true
 serde.workspace = true
diff --git a/crates/gateway/src/gateway.rs b/crates/gateway/src/gateway.rs
index e1c167dd..de4b4d26 100644
--- a/crates/gateway/src/gateway.rs
+++ b/crates/gateway/src/gateway.rs
@@ -11,9 +11,10 @@ use blockifier::execution::execution_utils::felt_to_stark_felt;
 use cairo_lang_starknet_classes::casm_contract_class::{
     CasmContractClass, CasmContractEntryPoints,
 };
+use lazy_static::lazy_static;
 use starknet_api::core::CompiledClassHash;
 use starknet_api::rpc_transaction::{RPCDeclareTransaction, RPCTransaction};
-use starknet_api::transaction::TransactionHash;
+use starknet_api::transaction::{Builtin, TransactionHash};
 use starknet_mempool_types::communication::SharedMempoolClient;
 use starknet_mempool_types::mempool_types::{Account, MempoolInput};
 use starknet_sierra_compile::compile::compile_sierra_to_casm;
@@ -27,7 +28,7 @@ use crate::starknet_api_test_utils::get_sender_address;
 use crate::state_reader::StateReaderFactory;
 use crate::stateful_transaction_validator::StatefulTransactionValidator;
 use crate::stateless_transaction_validator::StatelessTransactionValidator;
-use crate::utils::{external_tx_to_thin_tx, is_subsequence};
+use crate::utils::{external_tx_to_thin_tx, is_subsequence, IntoEnumIteratorExt, NameExt};
 
 #[cfg(test)]
 #[path = "gateway_test.rs"]
@@ -194,11 +195,30 @@ pub fn create_gateway(
     Gateway::new(config, state_reader_factory, client)
 }
 
+// List of supported builtins.
+// This is an explicit function so that it is explicitly desiced which builtins are supported.
+// If new builtins are added, they should be added here.
+fn is_supported_builtin(builtin: &Builtin) -> bool {
+    match builtin {
+        Builtin::RangeCheck
+        | Builtin::Pedersen
+        | Builtin::Poseidon
+        | Builtin::EcOp
+        | Builtin::Ecdsa
+        | Builtin::Bitwise
+        | Builtin::SegmentArena => true,
+        Builtin::Keccak => false,
+    }
+}
+
 // TODO(Arni): Add to a config.
-fn get_supported_builtins() -> Vec<String> {
-    let builtins =
-        ["pedersen", "range_check", "ecdsa", "bitwise", "ec_op", "poseidon", "segment_arena"];
-    builtins.iter().map(|builtin| builtin.to_string()).collect()
+lazy_static! {
+    static ref SUPPORTED_BUILTINS: Vec<String> = {
+        Builtin::iter()
+            .filter(is_supported_builtin)
+            .map(|builtin| builtin.name().to_string())
+            .collect::<Vec<String>>()
+    };
 }
 
 // TODO(Arni): Add test.
@@ -207,13 +227,13 @@ fn validate_casm_class(contract_class: &CasmContractClass) -> Result<(), Gateway
         &contract_class.entry_points_by_type;
     let entry_points_iterator = external.iter().chain(l1_handler.iter()).chain(constructor.iter());
 
-    let supported_builtins = &get_supported_builtins();
+    let supported_builtins = &SUPPORTED_BUILTINS;
     for entry_point in entry_points_iterator {
         let builtins = &entry_point.builtins;
         if !is_subsequence(builtins, supported_builtins) {
             return Err(GatewayError::SupportedBuiltins {
                 builtins: builtins.clone(),
-                supported_builtins: supported_builtins.clone(),
+                supported_builtins: supported_builtins.to_vec(),
             });
         }
     }
diff --git a/crates/gateway/src/utils.rs b/crates/gateway/src/utils.rs
index 396c3c01..7b4acb76 100644
--- a/crates/gateway/src/utils.rs
+++ b/crates/gateway/src/utils.rs
@@ -10,8 +10,9 @@ use starknet_api::rpc_transaction::{
     RPCDeclareTransaction, RPCDeployAccountTransaction, RPCInvokeTransaction, RPCTransaction,
 };
 use starknet_api::transaction::{
-    DeclareTransaction, DeclareTransactionV3, DeployAccountTransaction, DeployAccountTransactionV3,
-    InvokeTransaction, InvokeTransactionV3, Tip, TransactionHash, TransactionHasher,
+    Builtin, DeclareTransaction, DeclareTransactionV3, DeployAccountTransaction,
+    DeployAccountTransactionV3, InvokeTransaction, InvokeTransactionV3, Tip, TransactionHash,
+    TransactionHasher,
 };
 use starknet_mempool_types::mempool_types::ThinTransaction;
 
@@ -166,3 +167,54 @@ pub fn is_subsequence<T: Eq>(subsequence: &[T], sequence: &[T]) -> bool {
 
     offset == subsequence.len()
 }
+
+// TODO(Arni): Remove the trait NameExt and IntoEnumIteratorExt once it is implemented in starknet
+// API.
+const RANGE_CHACK_BUILTIN_NAME: &str = "range_check";
+const PEDERSEN_BUILTIN_NAME: &str = "pedersen";
+const POSEIDON_BUILTIN_NAME: &str = "poseidon";
+const EC_OP_BUILTIN_NAME: &str = "ec_op";
+const ECDSA_BUILTIN_NAME: &str = "ecdsa";
+const BITWISE_BUILTIN_NAME: &str = "bitwise";
+const KECCAK_BUILTIN_NAME: &str = "keccak";
+const SEGMENT_ARENA_BUILTIN_NAME: &str = "segment_arena";
+
+impl NameExt for Builtin {
+    fn name(&self) -> &'static str {
+        match self {
+            Builtin::RangeCheck => RANGE_CHACK_BUILTIN_NAME,
+            Builtin::Pedersen => PEDERSEN_BUILTIN_NAME,
+            Builtin::Poseidon => POSEIDON_BUILTIN_NAME,
+            Builtin::EcOp => EC_OP_BUILTIN_NAME,
+            Builtin::Ecdsa => ECDSA_BUILTIN_NAME,
+            Builtin::Bitwise => BITWISE_BUILTIN_NAME,
+            Builtin::Keccak => KECCAK_BUILTIN_NAME,
+            Builtin::SegmentArena => SEGMENT_ARENA_BUILTIN_NAME,
+        }
+    }
+}
+
+impl IntoEnumIteratorExt for Builtin {
+    fn iter() -> impl Iterator<Item = Self> {
+        vec![
+            Builtin::Pedersen,
+            Builtin::RangeCheck,
+            Builtin::Ecdsa,
+            Builtin::Bitwise,
+            Builtin::EcOp,
+            Builtin::Poseidon,
+            Builtin::SegmentArena,
+            Builtin::Keccak,
+        ]
+        .into_iter()
+    }
+}
+
+pub trait NameExt {
+    fn name(&self) -> &'static str;
+}
+
+pub trait IntoEnumIteratorExt {
+    #[allow(opaque_hidden_inferred_bound)]
+    fn iter() -> impl Iterator<Item = Self>;
+}