diff --git a/src/NJsonSchema.NewtonsoftJson/Generation/NewtonsoftJsonSchemaGeneratorSettings.cs b/src/NJsonSchema.NewtonsoftJson/Generation/NewtonsoftJsonSchemaGeneratorSettings.cs
index 3605848c1..fd9de959f 100644
--- a/src/NJsonSchema.NewtonsoftJson/Generation/NewtonsoftJsonSchemaGeneratorSettings.cs
+++ b/src/NJsonSchema.NewtonsoftJson/Generation/NewtonsoftJsonSchemaGeneratorSettings.cs
@@ -7,7 +7,6 @@
 //-----------------------------------------------------------------------
 
 using System.Collections.Concurrent;
-using System.Reflection;
 using Newtonsoft.Json.Serialization;
 using Newtonsoft.Json;
 using NJsonSchema.Generation;
@@ -20,6 +19,7 @@ public class NewtonsoftJsonSchemaGeneratorSettings : JsonSchemaGeneratorSettings
         private readonly ConcurrentDictionary<string, JsonContract?> _cachedContracts = [];
 
         private JsonSerializerSettings _serializerSettings;
+        private readonly DefaultContractResolver _defaultContractResolver = new();
 
         /// <summary>Initializes a new instance of the <see cref="JsonSchemaGeneratorSettings"/> class.</summary>
         public NewtonsoftJsonSchemaGeneratorSettings()
@@ -44,7 +44,7 @@ public JsonSerializerSettings SerializerSettings
         /// <returns>The contract resolver.</returns>
         /// <exception cref="InvalidOperationException">A setting is misconfigured.</exception>
         [JsonIgnore]
-        public IContractResolver ActualContractResolver => SerializerSettings?.ContractResolver ?? new DefaultContractResolver();
+        public IContractResolver ActualContractResolver => SerializerSettings?.ContractResolver ?? _defaultContractResolver;
 
         /// <summary>Gets the contract for the given type.</summary>
         /// <param name="type">The type.</param>
@@ -57,7 +57,14 @@ public JsonSerializerSettings SerializerSettings
                 return null;
             }
 
+#if NET8_0_OR_GREATER
+            return _cachedContracts.GetOrAdd(
+                key, static (_, state) => !state.type.IsGenericTypeDefinition ? state.ActualContractResolver.ResolveContract(state.type) : null,
+                (type, ActualContractResolver)
+            );
+#else
             return _cachedContracts.GetOrAdd(key, s => !type.IsGenericTypeDefinition ? ActualContractResolver.ResolveContract(type) : null);
+#endif
         }
     }
 }
\ No newline at end of file