diff --git a/.github/workflows/ReleaseNotes.md b/.github/workflows/ReleaseNotes.md
index e48d96ff..24a926c6 100644
--- a/.github/workflows/ReleaseNotes.md
+++ b/.github/workflows/ReleaseNotes.md
@@ -1 +1 @@
-* 
\ No newline at end of file
+* [Client] Fixed _PlatformNotSupportedException_ when using Blazor (#1755, thanks to @Nickztar).
\ No newline at end of file
diff --git a/Source/MQTTnet/Implementations/MqttWebSocketChannel.cs b/Source/MQTTnet/Implementations/MqttWebSocketChannel.cs
index 6ee5b451..e83b6566 100644
--- a/Source/MQTTnet/Implementations/MqttWebSocketChannel.cs
+++ b/Source/MQTTnet/Implementations/MqttWebSocketChannel.cs
@@ -221,11 +221,22 @@ namespace MQTTnet.Implementations
 
 #if !NETSTANDARD1_3
 #if !WINDOWS_UWP
-            clientWebSocket.Options.UseDefaultCredentials = _options.UseDefaultCredentials;
+            // Only set the value if it is actually true. This property is not supported on all platforms
+            // and will throw a _PlatformNotSupported_ (i.e. WASM) exception when being used regardless of the actual value.
+            if (_options.UseDefaultCredentials)
+            {
+                clientWebSocket.Options.UseDefaultCredentials = _options.UseDefaultCredentials;
+            }
 #endif
-            clientWebSocket.Options.KeepAliveInterval = _options.KeepAliveInterval;
+            if (_options.KeepAliveInterval != WebSocket.DefaultKeepAliveInterval)
+            {
+                clientWebSocket.Options.KeepAliveInterval = _options.KeepAliveInterval;
+            }
 #endif
-            clientWebSocket.Options.Credentials = _options.Credentials;
+            if (_options.Credentials != null)
+            {
+                clientWebSocket.Options.Credentials = _options.Credentials;
+            }
             
             var certificateValidationHandler = _options.TlsOptions?.CertificateValidationHandler;
             if (certificateValidationHandler != null)