diff --git a/src/RpcServer/RpcServer.SmartContract.cs b/src/RpcServer/RpcServer.SmartContract.cs
index f5cf6cbfc..cba590ba3 100644
--- a/src/RpcServer/RpcServer.SmartContract.cs
+++ b/src/RpcServer/RpcServer.SmartContract.cs
@@ -120,7 +120,7 @@ protected virtual JObject InvokeFunction(JArray _params)
         [RpcMethod]
         protected virtual JObject InvokeScript(JArray _params)
         {
-            byte[] script = _params[0].AsString().HexToBytes();
+            byte[] script = Convert.FromBase64String(_params[0].AsString());
             Signers signers = _params.Count >= 2 ? SignersFromJson((JArray)_params[1]) : null;
             return GetInvokeResult(script, signers);
         }