diff --git a/eng/Versions.props b/eng/Versions.props
index be46e3619b..bc9a12b3e2 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -242,7 +242,7 @@
     <IdentityServer4PackageVersion>3.0.0</IdentityServer4PackageVersion>
     <IdentityServer4StoragePackageVersion>3.0.0</IdentityServer4StoragePackageVersion>
     <IdentityServer4EntityFrameworkStoragePackageVersion>3.0.0</IdentityServer4EntityFrameworkStoragePackageVersion>
-    <MessagePackPackageVersion>2.0.335</MessagePackPackageVersion>
+    <MessagePackPackageVersion>2.1.80</MessagePackPackageVersion>
     <MoqPackageVersion>4.10.0</MoqPackageVersion>
     <MonoCecilPackageVersion>0.10.1</MonoCecilPackageVersion>
     <NewtonsoftJsonBsonPackageVersion>1.0.2</NewtonsoftJsonBsonPackageVersion>
diff --git a/src/SignalR/common/Protocols.MessagePack/src/Protocol/MessagePackHubProtocol.cs b/src/SignalR/common/Protocols.MessagePack/src/Protocol/MessagePackHubProtocol.cs
index b42dcf7cfd..bd16161b0e 100644
--- a/src/SignalR/common/Protocols.MessagePack/src/Protocol/MessagePackHubProtocol.cs
+++ b/src/SignalR/common/Protocols.MessagePack/src/Protocol/MessagePackHubProtocol.cs
@@ -54,6 +54,7 @@ namespace Microsoft.AspNetCore.SignalR.Protocol
         {
             var msgPackOptions = options.Value;
             SetupResolver(msgPackOptions);
+            _msgPackSerializerOptions.WithSecurity(MessagePackSecurity.UntrustedData);
         }
 
         private void SetupResolver(MessagePackHubProtocolOptions options)
@@ -64,7 +65,6 @@ namespace Microsoft.AspNetCore.SignalR.Protocol
             {
                 var resolver = CompositeResolver.Create(Array.Empty<IMessagePackFormatter>(), (IReadOnlyList<IFormatterResolver>)options.FormatterResolvers);
                 _msgPackSerializerOptions = MessagePackSerializerOptions.Standard.WithResolver(resolver);
-
                 return;
             }