diff --git a/.editorconfig b/.editorconfig
index def8856..263f5c7 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -131,6 +131,7 @@ csharp_prefer_braces = true:silent
 csharp_prefer_simple_using_statement = true:suggestion
 csharp_style_namespace_declarations = file_scoped:suggestion
 csharp_style_prefer_method_group_conversion = true:silent
+csharp_prefer_system_threading_lock = true:suggestion
 
 # Expression-level preferences
 csharp_prefer_simple_default_expression = true:suggestion
diff --git a/SqlDatabaseVectorSearch/Services/ChatService.cs b/SqlDatabaseVectorSearch/Services/ChatService.cs
index 8b07b2c..e6f3727 100644
--- a/SqlDatabaseVectorSearch/Services/ChatService.cs
+++ b/SqlDatabaseVectorSearch/Services/ChatService.cs
@@ -55,6 +55,7 @@ public class ChatService(IMemoryCache cache, IChatCompletionService chatCompleti
         }
 
         prompt.AppendLine($"""
+
             =====
             Answer the following question:
             ---
diff --git a/SqlDatabaseVectorSearch/Services/VectorSearchService.cs b/SqlDatabaseVectorSearch/Services/VectorSearchService.cs
index f21249d..4285da7 100644
--- a/SqlDatabaseVectorSearch/Services/VectorSearchService.cs
+++ b/SqlDatabaseVectorSearch/Services/VectorSearchService.cs
@@ -9,7 +9,6 @@ using Microsoft.SemanticKernel.Embeddings;
 using Microsoft.SemanticKernel.Text;
 using SqlDatabaseVectorSearch.Models;
 using SqlDatabaseVectorSearch.Settings;
-using TinyHelpers.Extensions;
 using UglyToad.PdfPig;
 using UglyToad.PdfPig.DocumentLayoutAnalysis.TextExtractor;
 
@@ -45,7 +44,7 @@ public class VectorSearchService(SqlConnection sqlConnection, ITextEmbeddingGene
         var embeddings = await textEmbeddingGenerationService.GenerateEmbeddingsAsync(paragraphs);
 
         // Save the document chunks and the corresponding embedding in the database.
-        foreach (var (paragraph, index) in paragraphs.WithIndex())
+        foreach (var (index, paragraph) in paragraphs.Index())
         {
             await sqlConnection.ExecuteAsync($"""
                 INSERT INTO DocumentChunks (DocumentId, [Index], Content, Embedding)
diff --git a/SqlDatabaseVectorSearch/SqlDatabaseVectorSearch.csproj b/SqlDatabaseVectorSearch/SqlDatabaseVectorSearch.csproj
index 690ba34..8b8cb22 100644
--- a/SqlDatabaseVectorSearch/SqlDatabaseVectorSearch.csproj
+++ b/SqlDatabaseVectorSearch/SqlDatabaseVectorSearch.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
 	<PropertyGroup>
-		<TargetFramework>net8.0</TargetFramework>
+		<TargetFramework>net9.0</TargetFramework>
 		<ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <NoWarn>$(NoWarn);SKEXP0001;SKEXP0010;SKEXP0050;</NoWarn>
@@ -9,13 +9,12 @@
 
 	<ItemGroup>
         <PackageReference Include="Dapper" Version="2.1.35" />
-		<PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.10" />
+		<PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.0" />
 		<PackageReference Include="Microsoft.Data.SqlClient" Version="5.2.2" />
         <PackageReference Include="Microsoft.SemanticKernel" Version="1.27.0" />
 		<PackageReference Include="MinimalHelpers.OpenApi" Version="2.0.17" />
 		<PackageReference Include="PdfPig" Version="0.1.9" />
-		<PackageReference Include="Swashbuckle.AspNetCore" Version="6.9.0" />
-		<PackageReference Include="TinyHelpers" Version="3.1.18" />
+		<PackageReference Include="Swashbuckle.AspNetCore" Version="7.0.0" />
 		<PackageReference Include="TinyHelpers.AspNetCore" Version="3.1.19" />
 	</ItemGroup>