diff --git a/.gitignore b/.gitignore
index 3a76619a..8a30d258 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,7 @@
 ## Ignore Visual Studio temporary files, build results, and
 ## files generated by popular Visual Studio add-ons.
 ##
-## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore
 
 # User-specific files
 *.rsuser
@@ -90,6 +90,7 @@ StyleCopReport.xml
 *.tmp_proj
 *_wpftmp.csproj
 *.log
+*.tlog
 *.vspscc
 *.vssscc
 .builds
@@ -293,6 +294,17 @@ node_modules/
 # Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
 *.vbw
 
+# Visual Studio 6 auto-generated project file (contains which files were open etc.)
+*.vbp
+
+# Visual Studio 6 workspace and project file (working project files containing files to include in project)
+*.dsw
+*.dsp
+
+# Visual Studio 6 technical files
+*.ncb
+*.aps
+
 # Visual Studio LightSwitch build output
 **/*.HTMLClient/GeneratedArtifacts
 **/*.DesktopClient/GeneratedArtifacts
@@ -349,6 +361,9 @@ ASALocalRun/
 # Local History for Visual Studio
 .localhistory/
 
+# Visual Studio History (VSHistory) files
+.vshistory/
+
 # BeatPulse healthcheck temp database
 healthchecksdb
 
@@ -361,5 +376,23 @@ MigrationBackup/
 # Fody - auto-generated XML schema
 FodyWeavers.xsd
 
-# Azure Resource Manager dependency files
-ServiceDependencies/
\ No newline at end of file
+# VS Code files for those working on multiple tools
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# Local History for Visual Studio Code
+.history/
+
+# Windows Installer files from build outputs
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# JetBrains Rider
+*.sln.iml
diff --git a/KeyVault.Acmebot/KeyVault.Acmebot.csproj b/KeyVault.Acmebot/KeyVault.Acmebot.csproj
index f9810d1d..95ab3374 100644
--- a/KeyVault.Acmebot/KeyVault.Acmebot.csproj
+++ b/KeyVault.Acmebot/KeyVault.Acmebot.csproj
@@ -4,7 +4,7 @@
     <AzureFunctionsVersion>v4</AzureFunctionsVersion>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="AWSSDK.Route53" Version="3.7.104.68" />
+    <PackageReference Include="AWSSDK.Route53" Version="3.7.104.76" />
     <PackageReference Include="Azure.Identity" Version="1.9.0" />
     <PackageReference Include="Azure.ResourceManager.Dns" Version="1.0.1" />
     <PackageReference Include="Azure.ResourceManager.PrivateDns" Version="1.0.1" />
@@ -14,7 +14,7 @@
     <PackageReference Include="DurableTask.TypedProxy" Version="2.2.2" />
     <PackageReference Include="Google.Apis.Dns.v1" Version="1.60.0.3018" />
     <PackageReference Include="Microsoft.Azure.Functions.Extensions" Version="1.1.0" />
-    <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.DurableTask" Version="2.9.4" />
+    <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.DurableTask" Version="2.9.5" />
     <PackageReference Include="Microsoft.Extensions.Http" Version="[6.0.*,7.0.0)" />
     <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.2.0" />
     <PackageReference Include="WebJobs.Extensions.HttpApi" Version="2.0.3" />
diff --git a/KeyVault.Acmebot/Options/AcmebotOptions.cs b/KeyVault.Acmebot/Options/AcmebotOptions.cs
index 3d5e5dfa..2fe08aea 100644
--- a/KeyVault.Acmebot/Options/AcmebotOptions.cs
+++ b/KeyVault.Acmebot/Options/AcmebotOptions.cs
@@ -27,6 +27,8 @@ public class AcmebotOptions
     [Range(0, 365)]
     public int RenewBeforeExpiry { get; set; } = 30;
 
+    public bool UseSystemNameServer { get; set; } = false;
+
     public ExternalAccountBindingOptions ExternalAccountBinding { get; set; }
 
     // Properties should be in alphabetical order
diff --git a/KeyVault.Acmebot/Startup.cs b/KeyVault.Acmebot/Startup.cs
index 5376cb8e..c29cf587 100644
--- a/KeyVault.Acmebot/Startup.cs
+++ b/KeyVault.Acmebot/Startup.cs
@@ -40,11 +40,17 @@ public override void Configure(IFunctionsHostBuilder builder)
 
         builder.Services.AddSingleton<ITelemetryInitializer, ApplicationVersionInitializer<Startup>>();
 
-        builder.Services.AddSingleton(new LookupClient(new LookupClientOptions(NameServer.GooglePublicDns, NameServer.GooglePublicDns2)
+        builder.Services.AddSingleton(provider =>
         {
-            UseCache = false,
-            UseRandomNameServer = true
-        }));
+            var options = provider.GetRequiredService<IOptions<AcmebotOptions>>();
+
+            var lookupClientOptions = options.Value.UseSystemNameServer ? new LookupClientOptions() : new LookupClientOptions(NameServer.GooglePublicDns, NameServer.GooglePublicDns2);
+
+            lookupClientOptions.UseCache = false;
+            lookupClientOptions.UseRandomNameServer = true;
+
+            return new LookupClient(lookupClientOptions);
+        });
 
         builder.Services.AddSingleton(provider =>
         {