diff --git a/pycardano/backend/blockfrost.py b/pycardano/backend/blockfrost.py
index 40c9ccc7..e2c8e0b8 100644
--- a/pycardano/backend/blockfrost.py
+++ b/pycardano/backend/blockfrost.py
@@ -165,6 +165,13 @@ def protocol_param(self) -> ProtocolParameters:
                 cost_models={
                     k: v.to_dict() for k, v in params.cost_models.to_dict().items()
                 },
+                # TODO: Update these when tiered pricing is enabled in Conway
+                maximum_reference_scripts_size={"bytes": 200000},
+                min_fee_reference_scripts={
+                    "base": params.min_fee_ref_script_cost_per_byte,
+                    "range": 200000,
+                    "multiplier": 1,
+                },
             )
         return self._protocol_param