diff --git a/src/engines/Nybus.Engine.RabbitMq/Configuration/IConfigurationFactory.cs b/src/engines/Nybus.Engine.RabbitMq/Configuration/IConfigurationFactory.cs
index b899855..b2f9c5a 100644
--- a/src/engines/Nybus.Engine.RabbitMq/Configuration/IConfigurationFactory.cs
+++ b/src/engines/Nybus.Engine.RabbitMq/Configuration/IConfigurationFactory.cs
@@ -28,6 +28,8 @@ public class RabbitMqOptions
         public ExchangeOptions CommandExchange { get; set; }
 
         public ExchangeOptions EventExchange { get; set; }
+
+        public ushort? UnackedMessageCountLimit { get; set; }
     }
 
     public class ConfigurationFactory : IConfigurationFactory
@@ -69,12 +71,14 @@ public IRabbitMqConfiguration Create(RabbitMqOptions options)
 
             return new RabbitMqConfiguration
             {
+                Options = options,
                 OutboundEncoding = outboundEncoding,
                 CommandQueueFactory = commandQueueFactory,
                 EventQueueFactory = eventQueueFactory,
                 ConnectionFactory = connectionFactory,
                 CommandExchangeManager = commandExchangeManager,
-                EventExchangeManager = eventExchangeManager
+                EventExchangeManager = eventExchangeManager,
+                UnackedMessageCountLimit = options.UnackedMessageCountLimit
             };
 
             IExchangeManager GetExchangeManager(ExchangeOptions exchangeOptions)
diff --git a/src/engines/Nybus.Engine.RabbitMq/Configuration/IRabbitMqConfiguration.cs b/src/engines/Nybus.Engine.RabbitMq/Configuration/IRabbitMqConfiguration.cs
index ebac33e..6b5bce0 100644
--- a/src/engines/Nybus.Engine.RabbitMq/Configuration/IRabbitMqConfiguration.cs
+++ b/src/engines/Nybus.Engine.RabbitMq/Configuration/IRabbitMqConfiguration.cs
@@ -14,12 +14,18 @@ public interface IRabbitMqConfiguration
         Encoding OutboundEncoding { get; set; }
 
         ISerializer Serializer { get; set; }
+
         IExchangeManager CommandExchangeManager { get; set; }
+
         IExchangeManager EventExchangeManager { get; set; }
+
+        ushort? UnackedMessageCountLimit { get; set; }
     }
 
     public class RabbitMqConfiguration : IRabbitMqConfiguration
     {
+        public RabbitMqOptions Options { get; set; }
+
         public IConnectionFactory ConnectionFactory { get; set; }
 
         public IQueueFactory CommandQueueFactory { get; set; }
@@ -34,5 +40,7 @@ public class RabbitMqConfiguration : IRabbitMqConfiguration
 
         public IExchangeManager EventExchangeManager { get; set; }
 
+        public ushort? UnackedMessageCountLimit { get; set; }
+
     }
 }
\ No newline at end of file
diff --git a/src/engines/Nybus.Engine.RabbitMq/RabbitMq/RabbitMqBusEngine.cs b/src/engines/Nybus.Engine.RabbitMq/RabbitMq/RabbitMqBusEngine.cs
index c8f3c60..502841d 100644
--- a/src/engines/Nybus.Engine.RabbitMq/RabbitMq/RabbitMqBusEngine.cs
+++ b/src/engines/Nybus.Engine.RabbitMq/RabbitMq/RabbitMqBusEngine.cs
@@ -39,6 +39,11 @@ public Task<IObservable<Message>> StartAsync()
             _connection = _configuration.ConnectionFactory.CreateConnection();
             _channel = _connection.CreateModel();
 
+            if (_configuration.UnackedMessageCountLimit.HasValue)
+            {
+                _channel.BasicQos(0, _configuration.UnackedMessageCountLimit.Value, true);
+            }
+
             var hasEvents = _messageDescriptorStore.HasEvents();
             var hasCommands = _messageDescriptorStore.HasCommands();
 
diff --git a/tests/Tests.Nybus.Engine.RabbitMq/Configuration/RabbitMqOptionsBindingTests.cs b/tests/Tests.Nybus.Engine.RabbitMq/Configuration/RabbitMqOptionsBindingTests.cs
index 2a00dad..8198023 100644
--- a/tests/Tests.Nybus.Engine.RabbitMq/Configuration/RabbitMqOptionsBindingTests.cs
+++ b/tests/Tests.Nybus.Engine.RabbitMq/Configuration/RabbitMqOptionsBindingTests.cs
@@ -145,5 +145,39 @@ public void ConnectionNode_is_correctly_bound(string userName, string password,
             Assert.That(sut.Connection["HostName"], Is.EqualTo(hostName));
             Assert.That(sut.Connection["VirtualHost"], Is.EqualTo(vhost));
         }
+
+        [Test, AutoMoqData]
+        public void UnackedMessageCountLimit_is_correctly_bound_when_value_is_provided(ushort limit)
+        {
+            var settings = new Dictionary<string, string>
+            {
+                [$"{nameof(RabbitMqOptions.UnackedMessageCountLimit)}"] = limit.ToString()
+            };
+
+            var configuration = CreateConfiguration(settings);
+
+            var sut = new RabbitMqOptions();
+
+            configuration.Bind(sut);
+
+            Assert.That(sut.UnackedMessageCountLimit, Is.EqualTo(limit));
+        }
+
+        [Test, AutoMoqData]
+        public void UnackedMessageCountLimit_is_correctly_bound_when_no_value_is_provided()
+        {
+            var settings = new Dictionary<string, string>
+            {
+                [$"{nameof(RabbitMqOptions.UnackedMessageCountLimit)}"] = null
+            };
+
+            var configuration = CreateConfiguration(settings);
+
+            var sut = new RabbitMqOptions();
+
+            configuration.Bind(sut);
+
+            Assert.That(sut.UnackedMessageCountLimit, Is.Null);
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/Tests.Nybus.Engine.RabbitMq/RabbitMq/RabbitMqBusEngineTests.cs b/tests/Tests.Nybus.Engine.RabbitMq/RabbitMq/RabbitMqBusEngineTests.cs
index 77cc7dd..dc0f6ce 100644
--- a/tests/Tests.Nybus.Engine.RabbitMq/RabbitMq/RabbitMqBusEngineTests.cs
+++ b/tests/Tests.Nybus.Engine.RabbitMq/RabbitMq/RabbitMqBusEngineTests.cs
@@ -5,7 +5,6 @@
 using System.Threading.Tasks;
 using AutoFixture.Idioms;
 using AutoFixture.NUnit3;
-using Microsoft.Extensions.Logging;
 using Moq;
 using NUnit.Framework;
 using Nybus;
@@ -737,5 +736,29 @@ public async Task NotifyFail_can_handle_closed_connections([Frozen] IRabbitMqCon
 
             Mock.Get(configuration.ConnectionFactory.CreateConnection().CreateModel()).Verify(p => p.BasicNack(deliveryTag, It.IsAny<bool>(), It.IsAny<bool>()));
         }
+
+        [Test, CustomAutoMoqData]
+        public async Task Global_QoS_is_sent_if_value_is_set([Frozen] IRabbitMqConfiguration configuration, RabbitMqBusEngine sut, ushort limit)
+        {
+            Mock.Get(configuration).SetupGet(p => p.UnackedMessageCountLimit).Returns(limit);
+
+            await sut.StartAsync();
+
+            await sut.StopAsync();
+
+            Mock.Get(configuration.ConnectionFactory.CreateConnection().CreateModel()).Verify(p => p.BasicQos(0, limit, true));
+        }
+
+        [Test, CustomAutoMoqData]
+        public async Task No_QoS_is_sent_if_no_value_is_set([Frozen] IRabbitMqConfiguration configuration, RabbitMqBusEngine sut)
+        {
+            Mock.Get(configuration).SetupGet(p => p.UnackedMessageCountLimit).Returns(null as ushort?);
+
+            await sut.StartAsync();
+
+            await sut.StopAsync();
+
+            Mock.Get(configuration.ConnectionFactory.CreateConnection().CreateModel()).Verify(p => p.BasicQos(It.IsAny<uint>(), It.IsAny<ushort>(), It.IsAny<bool>()), Times.Never);
+        }
     }
 }
\ No newline at end of file