diff --git a/BTCPayServer/Payments/PayJoin/PayJoinEndpointController.cs b/BTCPayServer/Payments/PayJoin/PayJoinEndpointController.cs
index 4a80f0087..4e3337302 100644
--- a/BTCPayServer/Payments/PayJoin/PayJoinEndpointController.cs
+++ b/BTCPayServer/Payments/PayJoin/PayJoinEndpointController.cs
@@ -350,13 +350,12 @@ namespace BTCPayServer.Payments.PayJoin
                 && feeOutputIndex < newTx.Outputs.Count
                 && !isOurOutput.Contains(newTx.Outputs[feeOutputIndex])
                 ? newTx.Outputs[feeOutputIndex] : null;
-            var rand = new Random();
             int senderInputCount = newTx.Inputs.Count;
             foreach (var selectedUTXO in selectedUTXOs.Select(o => o.Value))
             {
                 contributedAmount += (Money)selectedUTXO.Value;
                 var newInput = newTx.Inputs.Add(selectedUTXO.Outpoint);
-                newInput.Sequence = newTx.Inputs[rand.Next(0, senderInputCount)].Sequence;
+                newInput.Sequence = newTx.Inputs[(int)(RandomUtils.GetUInt32() % senderInputCount)].Sequence;
             }
             ourNewOutput.Value += contributedAmount;
             var minRelayTxFee = this._dashboard.Get(network.CryptoCode).Status.BitcoinStatus?.MinRelayTxFee ??
diff --git a/BTCPayServer/Security/Bitpay/TokenRepository.cs b/BTCPayServer/Security/Bitpay/TokenRepository.cs
index c2a72a107..44f06510d 100644
--- a/BTCPayServer/Security/Bitpay/TokenRepository.cs
+++ b/BTCPayServer/Security/Bitpay/TokenRepository.cs
@@ -52,11 +52,10 @@ namespace BTCPayServer.Security.Bitpay
             // It is legacy support and Bitpay generate string of unknown format, trying to replicate them
             // as good as possible. The string below got generated for me.
             var chars = "ERo0vkBMOYhyU0ZHvirCplbLDIGWPdi1ok77VnW7QdE";
-            var rand = new Random(Math.Abs(RandomUtils.GetInt32()));
             var generated = new char[chars.Length];
             for (int i = 0; i < generated.Length; i++)
             {
-                generated[i] = chars[rand.Next(0, generated.Length)];
+                generated[i] = chars[(int)(RandomUtils.GetUInt32() % generated.Length)];
             }
 
             using (var ctx = _Factory.CreateContext())