diff --git a/Runtime/Algorand.Unity/Clients/Kmd/KmdAccount.cs b/Runtime/Algorand.Unity/Clients/Kmd/KmdAccount.cs
index a16e6d82d..075e3094a 100644
--- a/Runtime/Algorand.Unity/Clients/Kmd/KmdAccount.cs
+++ b/Runtime/Algorand.Unity/Clients/Kmd/KmdAccount.cs
@@ -52,6 +52,7 @@ public async UniTask<SignedTxn<T>[]> SignTxnsAsync<T>(T[] txns, TxnIndices txnsT
                 while (indexEnum.MoveNext())
                 {
                     var i = indexEnum.Current;
+                    if (i >= txns.Length) break;
                     var serializedTxn = AlgoApiSerializer.SerializeMessagePack(txns[i]);
                     (signErr, signResp) = await client.SignTransaction(Address, serializedTxn, walletHandleToken, walletPassword);
                     signErr.ThrowIfError();