diff --git a/neo3/contracts/applicationengine.py b/neo3/contracts/applicationengine.py
index 1e1cc7f8..defe64cf 100644
--- a/neo3/contracts/applicationengine.py
+++ b/neo3/contracts/applicationengine.py
@@ -42,10 +42,10 @@ def __init__(self,
         self.notifications: List[Tuple[payloads.IVerifiable, types.UInt160, bytes, vm.ArrayStackItem]] = []
         if self.snapshot is None or self.snapshot.persisting_block is None or self.snapshot.persisting_block.index == 0:
             self.exec_fee_factor = contracts.PolicyContract().DEFAULT_EXEC_FEE_FACTOR
-            self.STORAGE_PRICE = contracts.PolicyContract().DEFAULT_STORAGE_PRICE
+            self.storage_price = contracts.PolicyContract().DEFAULT_STORAGE_PRICE
         else:
             self.exec_fee_factor = contracts.PolicyContract().get_exec_fee_factor(snapshot)
-            self.STORAGE_PRICE = contracts.PolicyContract().get_storage_price(snapshot)
+            self.storage_price = contracts.PolicyContract().get_storage_price(snapshot)
 
         if isinstance(self.script_container, payloads.Transaction):
             self.nonce_data = self.script_container.hash().to_array()[:16]
diff --git a/neo3/contracts/interop/storage.py b/neo3/contracts/interop/storage.py
index 3cd209f1..04df9d71 100644
--- a/neo3/contracts/interop/storage.py
+++ b/neo3/contracts/interop/storage.py
@@ -91,7 +91,7 @@ def storage_put(engine: contracts.ApplicationEngine, context: storage.StorageCon
         else:
             new_data_len = (len(item.value) - 1) // 4 + 1 + len(value) - len(item.value)
 
-    engine.add_gas(new_data_len * engine.STORAGE_PRICE)
+    engine.add_gas(new_data_len * engine.storage_price)
     item.value = value
 
 
diff --git a/neo3/contracts/native/management.py b/neo3/contracts/native/management.py
index 8da92535..bb585bcf 100644
--- a/neo3/contracts/native/management.py
+++ b/neo3/contracts/native/management.py
@@ -74,7 +74,7 @@ def contract_create_with_data(self,
             raise ValueError("Invalid NEF or manifest length")
 
         engine.add_gas(
-            max(engine.STORAGE_PRICE * (nef_len + manifest_len), self.get_minimum_deployment_fee(engine.snapshot))
+            max(engine.storage_price * (nef_len + manifest_len), self.get_minimum_deployment_fee(engine.snapshot))
         )
 
         nef = contracts.NEF.deserialize_from_bytes(nef_file)
@@ -128,7 +128,7 @@ def contract_update_with_data(self,
 
         nef_len = 0 if nef_file is None else len(nef_file)
         manifest_len = 0 if manifest is None else len(manifest)
-        engine.add_gas(engine.STORAGE_PRICE * (nef_len + manifest_len))
+        engine.add_gas(engine.storage_price * (nef_len + manifest_len))
 
         contract = engine.snapshot.contracts.try_get(engine.calling_scripthash, read_only=False)
         if contract is None:
diff --git a/neo3/contracts/native/nativecontract.py b/neo3/contracts/native/nativecontract.py
index 5600d3c8..19cec450 100644
--- a/neo3/contracts/native/nativecontract.py
+++ b/neo3/contracts/native/nativecontract.py
@@ -201,9 +201,9 @@ def invoke(self, engine: contracts.ApplicationEngine, version: int) -> None:
             raise ValueError(f"Method requires call flag: {method.required_flags} received: {flags}")
 
         engine.add_gas(method.cpu_price
-                       * contracts.PolicyContract().get_exec_fee_factor(engine.snapshot)
+                       * engine.exec_fee_factor
                        + method.storage_price
-                       * contracts.PolicyContract().get_storage_price(engine.snapshot))
+                       * engine.storage_price)
 
         params: List[Any] = []
         if method.add_engine: