diff --git a/Cargo.lock b/Cargo.lock
index 0f175579..5681eb97 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5449,6 +5449,7 @@ dependencies = [
  "async-trait",
  "axum",
  "blockifier 0.8.0-rc.0 (git+https://github.com/starkware-libs/blockifier.git?rev=32191d41)",
+ "cairo-lang-sierra-to-casm",
  "cairo-lang-starknet-classes",
  "cairo-vm",
  "hyper",
diff --git a/Cargo.toml b/Cargo.toml
index c7530e3b..b8461c7a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,6 +37,7 @@ axum = "0.6.12"
 bincode = "1.3.3"
 blockifier = { git = "https://github.com/starkware-libs/blockifier.git", rev = "32191d41" }
 cairo-lang-sierra = "2.7.0-dev.0"
+cairo-lang-sierra-to-casm = "2.7.0-dev.0"
 cairo-lang-starknet-classes = "2.7.0-dev.0"
 cairo-lang-utils = "2.7.0-dev.0"
 cairo-vm = "1.0.0-rc3"
diff --git a/crates/gateway/Cargo.toml b/crates/gateway/Cargo.toml
index 0d93cbfd..d98c4bdd 100644
--- a/crates/gateway/Cargo.toml
+++ b/crates/gateway/Cargo.toml
@@ -15,6 +15,7 @@ testing = []
 async-trait.workspace = true
 axum.workspace = true
 blockifier= { workspace = true, features = ["testing"] }
+cairo-lang-sierra-to-casm.workspace = true
 cairo-lang-starknet-classes.workspace = true
 cairo-vm.workspace = true
 hyper.workspace = true
diff --git a/crates/gateway/src/compilation.rs b/crates/gateway/src/compilation.rs
index 744fa386..d9ef92cd 100644
--- a/crates/gateway/src/compilation.rs
+++ b/crates/gateway/src/compilation.rs
@@ -65,18 +65,11 @@ impl GatewayCompiler {
     // the validation of the raw class size. The validation should be linked to the way the class is
     // saved in Papyrus etc.
     /// Validates that the Casm class is within size limit. Specifically, this function validates
-    /// the size of the bytecode and the serialized class.
+    /// the size of the serialized class.
     fn validate_casm_class_size(
         &self,
         casm_contract_class: &CasmContractClass,
     ) -> Result<(), GatewayError> {
-        let bytecode_size = casm_contract_class.bytecode.len();
-        if bytecode_size > self.config.max_casm_bytecode_size {
-            return Err(GatewayError::CasmBytecodeSizeTooLarge {
-                bytecode_size,
-                max_bytecode_size: self.config.max_casm_bytecode_size,
-            });
-        }
         let contract_class_object_size = serde_json::to_string(&casm_contract_class)
             .expect("Unexpected error serializing Casm contract class.")
             .len();
diff --git a/crates/gateway/src/compilation_test.rs b/crates/gateway/src/compilation_test.rs
index 6f7f3576..732fc56c 100644
--- a/crates/gateway/src/compilation_test.rs
+++ b/crates/gateway/src/compilation_test.rs
@@ -1,6 +1,8 @@
 use assert_matches::assert_matches;
 use blockifier::execution::contract_class::ContractClass;
+use cairo_lang_sierra_to_casm::compiler::CompilationError;
 use cairo_lang_starknet_classes::allowed_libfuncs::AllowedLibfuncsError;
+use cairo_lang_starknet_classes::casm_contract_class::StarknetSierraCompilationError;
 use mempool_test_utils::starknet_api_test_utils::declare_tx as rpc_declare_tx;
 use rstest::{fixture, rstest};
 use starknet_api::core::CompiledClassHash;
@@ -52,7 +54,13 @@ fn test_compile_contract_class_bytecode_size_validation(declare_tx: RPCDeclareTr
     };
 
     let result = gateway_compiler.process_declare_tx(&declare_tx);
-    assert_matches!(result.unwrap_err(), GatewayError::CasmBytecodeSizeTooLarge { .. })
+    assert_matches!(
+        result.unwrap_err(),
+        GatewayError::CompilationError(CompilationUtilError::StarknetSierraCompilationError(
+            StarknetSierraCompilationError::CompilationError(err)
+        ))
+        if matches!(err.as_ref(), CompilationError::CodeSizeLimitExceeded)
+    )
 }
 
 // TODO(Arni): Redesign this test once the compiler is passed with dependancy injection.
diff --git a/crates/gateway/src/errors.rs b/crates/gateway/src/errors.rs
index 3a83e97e..a21ec4ac 100644
--- a/crates/gateway/src/errors.rs
+++ b/crates/gateway/src/errors.rs
@@ -19,11 +19,6 @@ use crate::compiler_version::{VersionId, VersionIdError};
 /// Errors directed towards the end-user, as a result of gateway requests.
 #[derive(Debug, Error)]
 pub enum GatewayError {
-    #[error(
-        "Cannot declare Casm contract class with bytecode size of {bytecode_size}; max allowed \
-         size: {max_bytecode_size}."
-    )]
-    CasmBytecodeSizeTooLarge { bytecode_size: usize, max_bytecode_size: usize },
     #[error(
         "Cannot declare Casm contract class with size of {contract_class_object_size}; max \
          allowed size: {max_contract_class_object_size}."
diff --git a/crates/starknet_sierra_compile/src/compile.rs b/crates/starknet_sierra_compile/src/compile.rs
index 825c2a08..a1a05a24 100644
--- a/crates/starknet_sierra_compile/src/compile.rs
+++ b/crates/starknet_sierra_compile/src/compile.rs
@@ -7,29 +7,13 @@ use crate::errors::CompilationUtilError;
 #[cfg(test)]
 #[path = "compile_test.rs"]
 pub mod compile_test;
-struct SierraToCasmCompilationArgs {
-    list_selector: ListSelector,
-    add_pythonic_hints: bool,
-}
-
-impl Default for SierraToCasmCompilationArgs {
-    fn default() -> Self {
-        Self { list_selector: ListSelector::DefaultList, add_pythonic_hints: true }
-    }
-}
 
 /// This function may panic.
 pub fn compile_sierra_to_casm(
     contract_class: ContractClass,
     max_bytecode_size: usize,
 ) -> Result<CasmContractClass, CompilationUtilError> {
-    let compilation_args = SierraToCasmCompilationArgs::default();
-
-    contract_class.validate_version_compatible(compilation_args.list_selector)?;
+    contract_class.validate_version_compatible(ListSelector::DefaultList)?;
 
-    Ok(CasmContractClass::from_contract_class(
-        contract_class,
-        compilation_args.add_pythonic_hints,
-        max_bytecode_size,
-    )?)
+    Ok(CasmContractClass::from_contract_class(contract_class, true, max_bytecode_size)?)
 }