diff --git a/src/AgentCore.AspNetCore/Conversation/ConversationSweeper.cs b/src/AgentCore.AspNetCore/Conversation/ConversationSweeper.cs
index f71babca..c287bcd0 100644
--- a/src/AgentCore.AspNetCore/Conversation/ConversationSweeper.cs
+++ b/src/AgentCore.AspNetCore/Conversation/ConversationSweeper.cs
@@ -1,4 +1,5 @@
 using AgentCore.Application.Ports;
+using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
@@ -13,7 +14,7 @@ namespace AgentCore.AspNetCore.Conversation
     /// calling <c>AddConversationSweep</c>. Without that call, conversations are kept forever.
     /// </remarks>
     public sealed class ConversationSweeper(
-        IConversations conversations,
+        IServiceProvider services,
         IOptions<ConversationSweepOptions> options,
         TimeProvider timeProvider,
         ILogger<ConversationSweeper> logger) : BackgroundService
@@ -23,6 +24,9 @@ protected override async Task ExecuteAsync(CancellationToken stoppingToken)
         {
             ConversationSweepOptions settings = options.Value;
 
+            // Hosted service is constructed before AgentCore's own boot has not finished.
+            IConversations conversations = services.GetRequiredService<IConversations>();
+
             using PeriodicTimer timer = new(settings.Interval, timeProvider);
 
             while (await timer.WaitForNextTickAsync(stoppingToken).ConfigureAwait(false))
diff --git a/src/AgentCore.AspNetCore/PublicAPI.Unshipped.txt b/src/AgentCore.AspNetCore/PublicAPI.Unshipped.txt
index 7b434542..9464409f 100644
--- a/src/AgentCore.AspNetCore/PublicAPI.Unshipped.txt
+++ b/src/AgentCore.AspNetCore/PublicAPI.Unshipped.txt
@@ -96,5 +96,5 @@ AgentCore.AspNetCore.Conversation.ConversationSweepOptions.Interval.set -> void
 AgentCore.AspNetCore.Conversation.ConversationSweepOptions.BatchSize.get -> int
 AgentCore.AspNetCore.Conversation.ConversationSweepOptions.BatchSize.set -> void
 AgentCore.AspNetCore.Conversation.ConversationSweeper
-AgentCore.AspNetCore.Conversation.ConversationSweeper.ConversationSweeper(AgentCore.Application.Ports.IConversations! conversations, Microsoft.Extensions.Options.IOptions<AgentCore.AspNetCore.Conversation.ConversationSweepOptions!>! options, System.TimeProvider! timeProvider, Microsoft.Extensions.Logging.ILogger<AgentCore.AspNetCore.Conversation.ConversationSweeper!>! logger) -> void
+AgentCore.AspNetCore.Conversation.ConversationSweeper.ConversationSweeper(System.IServiceProvider! services, Microsoft.Extensions.Options.IOptions<AgentCore.AspNetCore.Conversation.ConversationSweepOptions!>! options, System.TimeProvider! timeProvider, Microsoft.Extensions.Logging.ILogger<AgentCore.AspNetCore.Conversation.ConversationSweeper!>! logger) -> void
 static AgentCore.AspNetCore.DependencyInjection.AgentCoreServiceCollectionExtensions.AddConversationSweep(this Microsoft.Extensions.DependencyInjection.IServiceCollection! services, System.Action<AgentCore.AspNetCore.Conversation.ConversationSweepOptions!>? configure = null) -> Microsoft.Extensions.DependencyInjection.IServiceCollection!