diff --git a/src/SocketIO.Serializer.SystemTextJson/SystemTextJsonSerializer.cs b/src/SocketIO.Serializer.SystemTextJson/SystemTextJsonSerializer.cs
index 067cf6e6..4430c75b 100644
--- a/src/SocketIO.Serializer.SystemTextJson/SystemTextJsonSerializer.cs
+++ b/src/SocketIO.Serializer.SystemTextJson/SystemTextJsonSerializer.cs
@@ -306,7 +306,7 @@ private SerializedItem SerializeEio4ConnectedMessage(string ns, object auth)
 
         #region Read Message
 
-        private static void ReadMessage(IMessage message, EngineIO eio, string text)
+        private void ReadMessage(IMessage message, EngineIO eio, string text)
         {
             switch (message.Type)
             {
@@ -343,11 +343,11 @@ private static void ReadMessage(IMessage message, EngineIO eio, string text)
             }
         }
 
-        private static void ReadOpenedMessage(IMessage message, string text)
+        private void ReadOpenedMessage(IMessage message, string text)
         {
             // TODO: Should deserializing to existing object
             // But haven't support yet. https://github.com/dotnet/runtime/issues/78556
-            var newMessage = JsonSerializer.Deserialize<JsonMessage>(text, new JsonSerializerOptions
+            var newMessage = JsonSerializer.Deserialize<JsonMessage>(text, new JsonSerializerOptions(_options)
             {
                 NumberHandling = JsonNumberHandling.AllowReadingFromString,
                 PropertyNamingPolicy = JsonNamingPolicy.CamelCase
@@ -543,4 +543,4 @@ private static void ReadBinaryAckMessage(IMessage message, string text)
 
         #endregion
     }
-}
\ No newline at end of file
+}