diff --git a/Web3Unity/Scripts/Library/ERC721.cs b/Web3Unity/Scripts/Library/ERC721.cs
index 9ec85c409..079f97f0d 100644
--- a/Web3Unity/Scripts/Library/ERC721.cs
+++ b/Web3Unity/Scripts/Library/ERC721.cs
@@ -35,7 +35,7 @@ public static async Task<string> OwnerOf(string _chain, string _network, string
         return response; 
     }
 
-    public static async Task<List<string>> OwnerOfBatch(string _chain, string _network, string _contract, string[] _tokenIds, string _rpc="")
+    public static async Task<List<string>> OwnerOfBatch(string _chain, string _network, string _contract, string[] _tokenIds, string _multicall = "", string _rpc="")
     {
         string method = "ownerOf";
         // build array of args
@@ -45,7 +45,7 @@ public static async Task<List<string>> OwnerOfBatch(string _chain, string _netwo
             obj[i] = new string[1] { _tokenIds[i] };
         };
         string args = JsonConvert.SerializeObject(obj);
-        string response = await EVM.MultiCall(_chain, _network, _contract, abi, method, args, _rpc);
+        string response = await EVM.MultiCall(_chain, _network, _contract, abi, method, args, _multicall, _rpc);
         try 
         {
             string[] responses = JsonConvert.DeserializeObject<string[]>(response);
diff --git a/Web3Unity/Scripts/Library/EVM.cs b/Web3Unity/Scripts/Library/EVM.cs
index d463df946..9143f5c22 100755
--- a/Web3Unity/Scripts/Library/EVM.cs
+++ b/Web3Unity/Scripts/Library/EVM.cs
@@ -55,7 +55,7 @@ public static async Task<string> Call(string _chain, string _network, string _co
     return data.response; 
   }
 
-  public static async Task<string> MultiCall(string _chain, string _network, string _contract, string _abi, string _method, string _args, string _rpc = "")
+  public static async Task<string> MultiCall(string _chain, string _network, string _contract, string _abi, string _method, string _args, string _multicall = "", string _rpc = "")
   {
     WWWForm form = new WWWForm();
     form.AddField("chain", _chain);
@@ -64,6 +64,7 @@ public static async Task<string> MultiCall(string _chain, string _network, strin
     form.AddField("abi", _abi);
     form.AddField("method", _method);
     form.AddField("args", _args);
+    form.AddField("multicall", _multicall);
     form.AddField("rpc", _rpc);
     string url = host + "/multicall";
     UnityWebRequest webRequest = UnityWebRequest.Post(url, form);
diff --git a/Web3Unity/Scripts/Prefabs/ERC721/ERC721OwnerOfBatchExample.cs b/Web3Unity/Scripts/Prefabs/ERC721/ERC721OwnerOfBatchExample.cs
index abffac3f4..d6bac114d 100644
--- a/Web3Unity/Scripts/Prefabs/ERC721/ERC721OwnerOfBatchExample.cs
+++ b/Web3Unity/Scripts/Prefabs/ERC721/ERC721OwnerOfBatchExample.cs
@@ -10,8 +10,10 @@ async void Start()
         string network = "mainnet";
         string contract = "0xA74E199990FF572A320508547Ab7f44EA51e6F28";
         string[] tokenIds = {"700", "791"};
+        string multicall = ""; // optional: multicall contract https://github.com/makerdao/multicall
+        string rpc = ""; // optional: custom rpc
 
-        List<string> batchOwners = await ERC721.OwnerOfBatch(chain, network, contract, tokenIds);
+        List<string> batchOwners = await ERC721.OwnerOfBatch(chain, network, contract, tokenIds, multicall, rpc);
         foreach (string owner in batchOwners)
         {
             print ("OwnerOfBatch: " + owner);