diff --git a/src/Workspaces/Remote/Core/ServiceDescriptor.cs b/src/Workspaces/Remote/Core/ServiceDescriptor.cs
index 68d4d25e8e557d77dda4144b716f9e7a2ea7a52e..a53014d0b0416cafd79432728ac52ea1e315546c 100644
--- a/src/Workspaces/Remote/Core/ServiceDescriptor.cs
+++ b/src/Workspaces/Remote/Core/ServiceDescriptor.cs
@@ -58,7 +58,7 @@ protected override IJsonRpcMessageFormatter CreateFormatter()
             => ConfigureFormatter((MessagePackFormatter)base.CreateFormatter());
 
         private static readonly MessagePackSerializerOptions s_options = StandardResolverAllowPrivate.Options
-            .WithSecurity(MessagePackSecurity.UntrustedData)
+            .WithSecurity(MessagePackSecurity.UntrustedData.WithHashCollisionResistant(false))
             .WithResolver(CompositeResolver.Create(
                 MessagePackFormatters.GetFormatters(),
                 new IFormatterResolver[] { ImmutableCollectionMessagePackResolver.Instance, StandardResolverAllowPrivate.Instance }));