diff --git a/src/GraphQL.Conventions/Web/IRequestHandler.cs b/src/GraphQL.Conventions/Web/IRequestHandler.cs
index 81f6bf76..d4ef236f 100644
--- a/src/GraphQL.Conventions/Web/IRequestHandler.cs
+++ b/src/GraphQL.Conventions/Web/IRequestHandler.cs
@@ -4,7 +4,7 @@ namespace GraphQL.Conventions.Web
 {
     public interface IRequestHandler
     {
-        Task<Response> ProcessRequest(Request request, IUserContext userContext);
+        Task<Response> ProcessRequest(Request request, IUserContext userContext, IDependencyInjector dependencyInjector = null);
 
         Response Validate(Request request);
 
diff --git a/src/GraphQL.Conventions/Web/RequestHandler.cs b/src/GraphQL.Conventions/Web/RequestHandler.cs
index 66f1bdd3..c6fac0b8 100644
--- a/src/GraphQL.Conventions/Web/RequestHandler.cs
+++ b/src/GraphQL.Conventions/Web/RequestHandler.cs
@@ -230,14 +230,14 @@ internal RequestHandlerImpl(
                 }
             }
 
-            public async Task<Response> ProcessRequest(Request request, IUserContext userContext)
+            public async Task<Response> ProcessRequest(Request request, IUserContext userContext, IDependencyInjector dependencyInjector = null)
             {
                 var result = await _engine
                     .NewExecutor()
                     .WithQueryString(request.QueryString)
                     .WithInputs(request.Variables)
                     .WithOperationName(request.OperationName)
-                    .WithDependencyInjector(_dependencyInjector)
+                    .WithDependencyInjector(dependencyInjector ?? _dependencyInjector)
                     .WithUserContext(userContext)
                     .WithComplexityConfiguration(_complexityConfiguration)
                     .EnableValidation(_useValidation)
diff --git a/test/Tests/Web/RequestHandlerTests.cs b/test/Tests/Web/RequestHandlerTests.cs
index 3a4fb3dd..2c8007a4 100644
--- a/test/Tests/Web/RequestHandlerTests.cs
+++ b/test/Tests/Web/RequestHandlerTests.cs
@@ -17,7 +17,7 @@ public async Task Can_Run_Query()
                 .New()
                 .WithQuery<TestQuery>()
                 .Generate()
-                .ProcessRequest(request, null);
+                .ProcessRequest(request, null, null);
 
             response.ExecutionResult.Data.ShouldHaveFieldWithValue("hello", "World");
             response.Body.ShouldEqual("{\"data\":{\"hello\":\"World\"}}");
@@ -34,7 +34,7 @@ public async Task Can_Run_Simple_Query_Using_ComplexityConfiguration()
                 .WithQuery<TestQuery>()
                 .WithComplexityConfiguration(new ComplexityConfiguration { MaxDepth = 2 })
                 .Generate()
-                .ProcessRequest(request, null);
+                .ProcessRequest(request, null, null);
 
             response.ExecutionResult.Data.ShouldHaveFieldWithValue("hello", "World");
             response.Body.ShouldEqual("{\"data\":{\"hello\":\"World\"}}");
@@ -51,7 +51,7 @@ public async Task Cannot_Run_Too_Complex_Query_Using_ComplexityConfiguration()
                 .WithQuery<TestQuery>()
                 .WithComplexityConfiguration(new ComplexityConfiguration { MaxDepth = 1 })
                 .Generate()
-                .ProcessRequest(request, null);
+                .ProcessRequest(request, null, null);
 
             response.Errors.Count.ShouldEqual(1);
             response.Errors[0].Message.ShouldEqual("Query is too nested to execute. Depth is 2 levels, maximum allowed on this endpoint is 1.");
@@ -66,7 +66,7 @@ public async Task Can_Enrich_With_Profiling_Information()
                 .WithQuery<ProfiledQuery>()
                 .WithProfiling()
                 .Generate()
-                .ProcessRequest(request, null);
+                .ProcessRequest(request, null, null);
             response.EnrichWithProfilingInformation();
             response.Body.ShouldContain("\"extensions\":{\"profile\":");
         }
@@ -80,7 +80,7 @@ public async Task Can_Ignore_Types_From_Unwanted_Namespaces()
                 .New()
                 .WithQuery<CompositeQuery>()
                 .Generate()
-                .ProcessRequest(request, null);
+                .ProcessRequest(request, null, null);
             response.Body.ShouldEqual("{\"data\":{\"earth\":{\"hello\":\"World\"},\"mars\":{\"hello\":\"World From Mars\"}}}");
 
             // Exclude types from 'Unwanted' namespace, i.e. TypeQuery2 from CompositeQuery schema
@@ -90,7 +90,7 @@ public async Task Can_Ignore_Types_From_Unwanted_Namespaces()
                 .IgnoreTypesFromNamespacesStartingWith("GraphQL.Conventions.Tests.Web.Unwanted")
                 .WithQuery<CompositeQuery>()
                 .Generate()
-                .ProcessRequest(request, null);
+                .ProcessRequest(request, null, null);
             response.Errors.Count.ShouldEqual(1);
             response.Errors[0].Message.ShouldContain("Cannot query field \"hello\" on type \"TestQuery2\".");
             response.Body.ShouldContain("VALIDATION_ERROR");