diff --git a/crates/native_blockifier/src/py_transaction.rs b/crates/native_blockifier/src/py_transaction.rs
index 6d7bf55ce75..5ba4ac02ec2 100644
--- a/crates/native_blockifier/src/py_transaction.rs
+++ b/crates/native_blockifier/src/py_transaction.rs
@@ -165,7 +165,7 @@ pub struct PyClassInfo {
     raw_contract_class: String,
     sierra_program_length: usize,
     abi_length: usize,
-    sierra_version: (u64, u64, u64),
+    sierra_version: Option<(u64, u64, u64)>,
 }
 
 impl PyClassInfo {
@@ -184,13 +184,12 @@ impl PyClassInfo {
                 SierraVersion::from(py_class_info.sierra_version),
             )),
         };
-        let (major, minor, patch) = py_class_info.sierra_version;
 
         let class_info = ClassInfo::new(
             &contract_class,
             py_class_info.sierra_program_length,
             py_class_info.abi_length,
-            SierraVersion::new(major, minor, patch),
+            SierraVersion::from(py_class_info.sierra_version),
         )?;
         Ok(class_info)
     }
diff --git a/crates/starknet_api/src/contract_class.rs b/crates/starknet_api/src/contract_class.rs
index 4d4b742883f..c29ebbb6a07 100644
--- a/crates/starknet_api/src/contract_class.rs
+++ b/crates/starknet_api/src/contract_class.rs
@@ -118,9 +118,12 @@ impl FromStr for SierraVersion {
     }
 }
 
-impl From<(u64, u64, u64)> for SierraVersion {
-    fn from((major, minor, patch): (u64, u64, u64)) -> Self {
-        Self::new(major, minor, patch)
+impl From<Option<(u64, u64, u64)>> for SierraVersion {
+    fn from(optional_sierra_version: Option<(u64, u64, u64)>) -> Self {
+        match optional_sierra_version {
+            Some((major, minor, patch)) => Self::new(major, minor, patch),
+            None => Self::DEPRECATED,
+        }
     }
 }