diff --git a/EnvelopeGenerator.API/Program.cs b/EnvelopeGenerator.API/Program.cs
index f2478083..b7f53299 100644
--- a/EnvelopeGenerator.API/Program.cs
+++ b/EnvelopeGenerator.API/Program.cs
@@ -111,7 +111,9 @@ try
 
         options.DocumentFilter<EnvelopeGenerator.API.Documentation.AuthProxyDocumentFilter>();
     });
+#if NET9_0_OR_GREATER
     builder.Services.AddOpenApi();
+#endif
 
     //Add EF Core dbcontext
     var useDbMigration = Environment.GetEnvironmentVariable("MIGRATION_TEST_MODE") == true.ToString() || config.GetValue<bool>("UseDbMigration");