diff --git a/src/ScadaLink.TemplateEngine/ServiceCollectionExtensions.cs b/src/ScadaLink.TemplateEngine/ServiceCollectionExtensions.cs
index 02d274f..acef971 100644
--- a/src/ScadaLink.TemplateEngine/ServiceCollectionExtensions.cs
+++ b/src/ScadaLink.TemplateEngine/ServiceCollectionExtensions.cs
@@ -26,6 +26,7 @@ public static class ServiceCollectionExtensions
         services.AddScoped<InstanceService>();
         services.AddScoped<SiteService>();
         services.AddScoped<AreaService>();
+        services.AddScoped<TemplateFolderService>();
         services.AddScoped<TemplateDeletionService>();
 
         // Note: CycleDetector, CollisionDetector, LockEnforcer, and TemplateResolver