diff --git a/src/framework/Framework.Swagger/SwaggerGenConfiguration.cs b/src/framework/Framework.Swagger/SwaggerGenConfiguration.cs
index 8bfcf3b5d4..da01b63fa0 100644
--- a/src/framework/Framework.Swagger/SwaggerGenConfiguration.cs
+++ b/src/framework/Framework.Swagger/SwaggerGenConfiguration.cs
@@ -35,6 +35,7 @@ public static void SetupSwaggerGen<TProgram>(SwaggerGenOptions c, string version
         c.SwaggerDoc(version, new OpenApiInfo { Title = assemblyName, Version = version });
 
         c.MapType(typeof(IFormFile), () => new OpenApiSchema { Type = "file", Format = "binary" });
+        c.SupportNonNullableReferenceTypes();
 
         c.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
         {