diff --git a/src/SignalR/common/Protocols.Json/src/Protocol/JsonHubProtocol.cs b/src/SignalR/common/Protocols.Json/src/Protocol/JsonHubProtocol.cs
index 34c8764214..ecf677c087 100644
--- a/src/SignalR/common/Protocols.Json/src/Protocol/JsonHubProtocol.cs
+++ b/src/SignalR/common/Protocols.Json/src/Protocol/JsonHubProtocol.cs
@@ -776,6 +776,10 @@ namespace Microsoft.AspNetCore.SignalR.Protocol
             options.IgnoreNullValues = false;
             options.IgnoreReadOnlyProperties = false;
             options.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
+            options.PropertyNameCaseInsensitive = false;
+            options.MaxDepth = 64;
+            options.DictionaryKeyPolicy = null;
+            options.DefaultBufferSize = 16 * 1024;
 
             return options;
         }