diff --git a/Source/MQTTnet/Client/MqttClientOptionsBuilder.cs b/Source/MQTTnet/Client/MqttClientOptionsBuilder.cs
index 07e98198..e612981b 100644
--- a/Source/MQTTnet/Client/MqttClientOptionsBuilder.cs
+++ b/Source/MQTTnet/Client/MqttClientOptionsBuilder.cs
@@ -113,7 +113,7 @@ namespace MQTTnet.Client
             {
                 Uri = uri,
                 RequestHeaders = parameters.RequestHeaders,
-                CookieContainer = parameters.CookierContainer
+                CookieContainer = parameters.CookieContainer
             };
 
             return this;
diff --git a/Source/MQTTnet/Client/MqttClientOptionsBuilderWebSocketParameters.cs b/Source/MQTTnet/Client/MqttClientOptionsBuilderWebSocketParameters.cs
index 7ecb2301..54e048bc 100644
--- a/Source/MQTTnet/Client/MqttClientOptionsBuilderWebSocketParameters.cs
+++ b/Source/MQTTnet/Client/MqttClientOptionsBuilderWebSocketParameters.cs
@@ -7,6 +7,6 @@ namespace MQTTnet.Client
     {
         public IDictionary<string, string> RequestHeaders { get; set; }
 
-        public CookieContainer CookierContainer { get; set; }
+        public CookieContainer CookieContainer { get; set; }
     }
 }