diff --git a/RMuseum/Startup.cs b/RMuseum/Startup.cs
index 41c884f5..333cb66b 100644
--- a/RMuseum/Startup.cs
+++ b/RMuseum/Startup.cs
@@ -303,6 +303,9 @@ namespace RMuseum
             //faq service
             services.AddTransient<IFAQService, FAQService>();
 
+            //PDF library service
+            services.AddTransient<IPDFLibraryService, PDFLibraryService>();
+
             //upload limit for IIS
             services.Configure<IISServerOptions>(options =>
             {