diff --git a/services/Archival/FilterLists.Archival.Api/Startup.cs b/services/Archival/FilterLists.Archival.Api/Startup.cs
index b966a4ac5..a73bc4e70 100644
--- a/services/Archival/FilterLists.Archival.Api/Startup.cs
+++ b/services/Archival/FilterLists.Archival.Api/Startup.cs
@@ -1,4 +1,5 @@
-using FilterLists.Archival.Application;
+using System.Text.Json.Serialization;
+using FilterLists.Archival.Application;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Configuration;
@@ -19,7 +20,8 @@ public Startup(IConfiguration configuration)
         public void ConfigureServices(IServiceCollection services)
         {
             services.AddRouting(o => o.LowercaseUrls = true);
-            services.AddControllers().AddJsonOptions(o => o.JsonSerializerOptions.IgnoreNullValues = true);
+            services.AddControllers().AddJsonOptions(o =>
+                o.JsonSerializerOptions.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull);
             services.AddSwaggerGen();
             services.AddApplicationServices(Configuration);
         }
diff --git a/services/Directory/FilterLists.Directory.Api/Startup.cs b/services/Directory/FilterLists.Directory.Api/Startup.cs
index 95a7c3c50..c74a0964e 100644
--- a/services/Directory/FilterLists.Directory.Api/Startup.cs
+++ b/services/Directory/FilterLists.Directory.Api/Startup.cs
@@ -1,4 +1,5 @@
-using FilterLists.Directory.Application;
+using System.Text.Json.Serialization;
+using FilterLists.Directory.Application;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Configuration;
@@ -20,7 +21,8 @@ public void ConfigureServices(IServiceCollection services)
         {
             services.AddMemoryCache();
             services.AddRouting(o => o.LowercaseUrls = true);
-            services.AddControllers().AddJsonOptions(o => o.JsonSerializerOptions.IgnoreNullValues = true);
+            services.AddControllers().AddJsonOptions(o =>
+                o.JsonSerializerOptions.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull);
             services.AddSwaggerGen();
             services.AddApplicationServices(Configuration);
         }