diff --git a/src/GraphQL.Client/GraphQLHttpRequest.cs b/src/GraphQL.Client/GraphQLHttpRequest.cs
index 2da60705..c68379c1 100644
--- a/src/GraphQL.Client/GraphQLHttpRequest.cs
+++ b/src/GraphQL.Client/GraphQLHttpRequest.cs
@@ -39,7 +39,7 @@ public virtual HttpRequestMessage ToHttpRequestMessage(GraphQLHttpClientOptions
         {
             Content = new StringContent(serializer.SerializeToString(this), Encoding.UTF8, options.MediaType)
         };
-        message.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/graphql+json"));
+        message.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/graphql-response+json"));
         message.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
         message.Headers.AcceptCharset.Add(new StringWithQualityHeaderValue("utf-8"));
 
diff --git a/tests/GraphQL.Integration.Tests/QueryAndMutationTests/Base.cs b/tests/GraphQL.Integration.Tests/QueryAndMutationTests/Base.cs
index abcdc644..bff54832 100644
--- a/tests/GraphQL.Integration.Tests/QueryAndMutationTests/Base.cs
+++ b/tests/GraphQL.Integration.Tests/QueryAndMutationTests/Base.cs
@@ -176,7 +176,7 @@ public async void PreprocessHttpRequestMessageIsCalled()
 
         var expectedHeaders = new HttpRequestMessage().Headers;
         expectedHeaders.UserAgent.Add(new ProductInfoHeaderValue("GraphQL.Client", typeof(GraphQLHttpClient).Assembly.GetName().Version.ToString()));
-        expectedHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/graphql+json"));
+        expectedHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/graphql-response+json"));
         expectedHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
         expectedHeaders.AcceptCharset.Add(new StringWithQualityHeaderValue("utf-8"));
         var response = await StarWarsClient.SendQueryAsync(graphQLRequest, () => new { Human = new { Name = string.Empty } });