diff --git a/RhSolutions.AddIn/AddIn/RhSolutionsAddIn.cs b/RhSolutions.AddIn/AddIn/RhSolutionsAddIn.cs
index 8f5fd71..19a99d2 100644
--- a/RhSolutions.AddIn/AddIn/RhSolutionsAddIn.cs
+++ b/RhSolutions.AddIn/AddIn/RhSolutionsAddIn.cs
@@ -24,7 +24,7 @@ public sealed class RhSolutionsAddIn : IExcelAddIn
             .AddSingleton((Application)ExcelDnaUtil.Application)
             .AddSingleton<IAddInConfiguration, AddInConfiguration>()
             .AddSingleton<IDatabaseClient, DatabaseClient>()
-            .AddTransient<ICurrencyClient, CurrencyClient>()
+            .AddSingleton<ICurrencyClient, CurrencyClient>()
             .AddTransient<IFileDialog, FileDialog>();
 
         Services.AddSingleton<WriterFactory>();