diff --git a/League/BackgroundTasks/SendEmailTask.cs b/League/BackgroundTasks/SendEmailTask.cs
index 3aa25fe6..fa192be4 100644
--- a/League/BackgroundTasks/SendEmailTask.cs
+++ b/League/BackgroundTasks/SendEmailTask.cs
@@ -72,7 +72,7 @@ public async Task RunAsync(CancellationToken cancellationToken)
         {
             try
             {
-                await _mailMergeService.Sender.SendAsync(mmm, null);
+                await _mailMergeService.Sender.SendAsync(mmm, null!);
             }
             catch (Exception e) when (e is TaskCanceledException || e is OperationCanceledException)
             {
diff --git a/League/Emailing/Creators/ContactFormCreator.cs b/League/Emailing/Creators/ContactFormCreator.cs
index 0d90b92c..252cb531 100644
--- a/League/Emailing/Creators/ContactFormCreator.cs
+++ b/League/Emailing/Creators/ContactFormCreator.cs
@@ -46,7 +46,7 @@ public async IAsyncEnumerable<MailMergeMessage> GetMailMergeMessages(ITenantCont
 
             var mailMergeMessage = mailMergeService.CreateStandardMessage();
             mailMergeMessage.EnableFormatter = false;
-            mailMergeMessage.Subject = model.Form.Subject; // user-generated, cannot localize!
+            mailMergeMessage.Subject = model.Form.Subject!; // user-generated, cannot localize!
                 
             mailMergeMessage.MailMergeAddresses.Add(new MailMergeAddress(MailAddressType.From, tenantContext.SiteContext.Email.ContactFrom.Address));
             mailMergeMessage.MailMergeAddresses.Add(new MailMergeAddress(MailAddressType.To, tenantContext.SiteContext.Email.ContactTo.Address));
diff --git a/League/League.csproj b/League/League.csproj
index 9c7ea2d0..41a765fe 100644
--- a/League/League.csproj
+++ b/League/League.csproj
@@ -45,7 +45,7 @@ Localizations for English and German are included. The library is in operation o
     <ItemGroup>
         <PackageReference Include="Axuno.TextTemplating" Version="2.0.1" />
         <PackageReference Include="JSNLog" Version="3.0.1" />
-        <PackageReference Include="MailMergeLib" Version="5.9.1" />
+        <PackageReference Include="MailMergeLib" Version="5.11.0" />
         <PackageReference Include="Microsoft.AspNetCore.Authentication.Facebook" Version="6.0.3" />
         <PackageReference Include="Microsoft.AspNetCore.Authentication.Google" Version="6.0.3" />
         <PackageReference Include="Microsoft.AspNetCore.Authentication.MicrosoftAccount" Version="6.0.3" />
@@ -57,9 +57,9 @@ Localizations for English and German are included. The library is in operation o
         </PackageReference>
         <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="6.0.2" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-        <PackageReference Include="NLog" Version="5.1.1" />
-        <PackageReference Include="NLog.Web.AspNetCore" Version="5.2.1" />
-        <PackageReference Include="NuGetizer" Version="0.9.1">
+        <PackageReference Include="NLog" Version="5.2.1" />
+        <PackageReference Include="NLog.Web.AspNetCore" Version="5.3.1" />
+        <PackageReference Include="NuGetizer" Version="1.0.4">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
diff --git a/League/LeagueStartup.cs b/League/LeagueStartup.cs
index 8728b075..3c393ca1 100644
--- a/League/LeagueStartup.cs
+++ b/League/LeagueStartup.cs
@@ -454,7 +454,7 @@ public static void ConfigureServices(WebHostBuilderContext context, IServiceColl
                         $@"MailMergeLib.{environment.EnvironmentName}.config"),
                     System.Text.Encoding.UTF8);
                 var fms = FileMessageStore.Deserialize(Path.Combine(environment.ContentRootPath, League.LeagueStartup.ConfigurationFolder,
-                    "MailMergeLibMessageStore.config"), System.Text.Encoding.UTF8);
+                    "MailMergeLibMessageStore.config"), System.Text.Encoding.UTF8)!;
                 for (var i = 0; i < fms.SearchFolders.Length; i++)
                 {
                     // make relative paths absolute - ready to use