diff --git a/src/neo/SmartContract/Native/ContractManagement.cs b/src/neo/SmartContract/Native/ContractManagement.cs
index 1bbfbac331..229dbecee7 100644
--- a/src/neo/SmartContract/Native/ContractManagement.cs
+++ b/src/neo/SmartContract/Native/ContractManagement.cs
@@ -120,6 +120,12 @@ public IEnumerable<ContractState> ListContracts(StoreView snapshot)
             return snapshot.Storages.Find(listContractsPrefix).Select(kvp => kvp.Value.GetInteroperable<ContractState>());
         }
 
+        [ContractMethod(0, CallFlags.WriteStates | CallFlags.AllowNotify)]
+        private ContractState Deploy(ApplicationEngine engine, byte[] nefFile, byte[] manifest)
+        {
+            return Deploy(engine, nefFile, manifest, StackItem.Null);
+        }
+
         [ContractMethod(0, CallFlags.WriteStates | CallFlags.AllowNotify)]
         private ContractState Deploy(ApplicationEngine engine, byte[] nefFile, byte[] manifest, StackItem data)
         {
@@ -164,6 +170,12 @@ private ContractState Deploy(ApplicationEngine engine, byte[] nefFile, byte[] ma
             return contract;
         }
 
+        [ContractMethod(0, CallFlags.WriteStates | CallFlags.AllowNotify)]
+        private void Update(ApplicationEngine engine, byte[] nefFile, byte[] manifest)
+        {
+            Update(engine, nefFile, manifest, StackItem.Null);
+        }
+
         [ContractMethod(0, CallFlags.WriteStates | CallFlags.AllowNotify)]
         private void Update(ApplicationEngine engine, byte[] nefFile, byte[] manifest, StackItem data)
         {
diff --git a/src/neo/SmartContract/Native/NativeContract.cs b/src/neo/SmartContract/Native/NativeContract.cs
index 64fc0544a8..1f2443b79c 100644
--- a/src/neo/SmartContract/Native/NativeContract.cs
+++ b/src/neo/SmartContract/Native/NativeContract.cs
@@ -16,7 +16,7 @@ public abstract class NativeContract
         private static readonly List<NativeContract> contractsList = new List<NativeContract>();
         private static readonly Dictionary<int, NativeContract> contractsIdDictionary = new Dictionary<int, NativeContract>();
         private static readonly Dictionary<UInt160, NativeContract> contractsHashDictionary = new Dictionary<UInt160, NativeContract>();
-        private readonly Dictionary<string, ContractMethodMetadata> methods = new Dictionary<string, ContractMethodMetadata>();
+        private readonly Dictionary<(string, int), ContractMethodMetadata> methods = new Dictionary<(string, int), ContractMethodMetadata>();
         private static int id_counter = 0;
 
         #region Named Native Contracts
@@ -69,7 +69,7 @@ protected NativeContract()
                     Parameters = metadata.Parameters.Select(p => new ContractParameterDefinition { Type = ToParameterType(p.Type), Name = p.Name }).ToArray(),
                     Safe = (attribute.RequiredCallFlags & ~CallFlags.ReadOnly) == 0
                 });
-                methods.Add(metadata.Name, metadata);
+                methods.Add((metadata.Name, metadata.Parameters.Length), metadata);
             }
             this.Manifest = new ContractManifest
             {
@@ -121,7 +121,7 @@ internal void Invoke(ApplicationEngine engine)
                 throw new InvalidOperationException("It is not allowed to use Neo.Native.Call directly to call native contracts. System.Contract.Call should be used.");
             ExecutionContext context = engine.CurrentContext;
             string operation = context.EvaluationStack.Pop().GetString();
-            ContractMethodMetadata method = methods[operation];
+            ContractMethodMetadata method = methods[(operation, context.EvaluationStack.Count)];
             ExecutionContextState state = context.GetState<ExecutionContextState>();
             if (!state.CallFlags.HasFlag(method.RequiredCallFlags))
                 throw new InvalidOperationException($"Cannot call this method with the flag {state.CallFlags}.");
diff --git a/tests/neo.UnitTests/SmartContract/Native/UT_NativeContract.cs b/tests/neo.UnitTests/SmartContract/Native/UT_NativeContract.cs
index d8704b614a..4f378c13e1 100644
--- a/tests/neo.UnitTests/SmartContract/Native/UT_NativeContract.cs
+++ b/tests/neo.UnitTests/SmartContract/Native/UT_NativeContract.cs
@@ -8,7 +8,6 @@
 using System;
 using System.Collections.Generic;
 using System.Numerics;
-using VMArray = Neo.VM.Types.Array;
 
 namespace Neo.UnitTests.SmartContract.Native
 {
@@ -100,14 +99,10 @@ public void TestInvoke()
             engine.LoadScript(testNativeContract.Script, configureState: p => p.ScriptHash = testNativeContract.Hash);
 
             ByteString method1 = new ByteString(System.Text.Encoding.Default.GetBytes("wrongMethod"));
-            VMArray args1 = new VMArray();
-            engine.CurrentContext.EvaluationStack.Push(args1);
             engine.CurrentContext.EvaluationStack.Push(method1);
             Assert.ThrowsException<KeyNotFoundException>(() => testNativeContract.Invoke(engine));
 
             ByteString method2 = new ByteString(System.Text.Encoding.Default.GetBytes("helloWorld"));
-            VMArray args2 = new VMArray();
-            engine.CurrentContext.EvaluationStack.Push(args2);
             engine.CurrentContext.EvaluationStack.Push(method2);
             testNativeContract.Invoke(engine);
         }