diff --git a/src/ScalusConfiguration.cs b/src/ScalusConfiguration.cs
index b9f6cf4..f41b549 100644
--- a/src/ScalusConfiguration.cs
+++ b/src/ScalusConfiguration.cs
@@ -40,7 +40,7 @@ public IProtocolHandler GetProtocolHandler(string uri)
         {
             Serilog.Log.Information($"Checking configuration for url:{uri}");
             // var manually parse out the protocol
-            var index = uri.IndexOf("://");
+            var index = uri.IndexOf("://", StringComparison.Ordinal);
             var protocol = string.Empty;
             if (index >= 0)
             {