diff --git a/src/WireMock.Net/Owin/WireMockMiddleware.cs b/src/WireMock.Net/Owin/WireMockMiddleware.cs
index dc59a4ab..8d0d0488 100644
--- a/src/WireMock.Net/Owin/WireMockMiddleware.cs
+++ b/src/WireMock.Net/Owin/WireMockMiddleware.cs
@@ -42,12 +42,6 @@ namespace WireMock.Owin
         public async Task Invoke(HttpContext ctx)
 #endif
         {
-            if (_options.RequestProcessingDelay > TimeSpan.Zero)
-            {
-                await Task.Delay(_options.RequestProcessingDelay.Value);
-                // Thread.Sleep(_options.RequestProcessingDelay.Value);
-            }
-
             var request = await _requestMapper.MapAsync(ctx.Request);
 
             ResponseMessage response = null;
@@ -103,6 +97,11 @@ namespace WireMock.Owin
                     }
                 }
 
+                if (!targetMapping.IsAdminInterface && _options.RequestProcessingDelay > TimeSpan.Zero)
+                {
+                    await Task.Delay(_options.RequestProcessingDelay.Value);
+                }
+
                 response = await targetMapping.ResponseToAsync(request);
             }
             catch (Exception ex)