diff --git a/src/Acmebot.App/Program.cs b/src/Acmebot.App/Program.cs
index d2a969e2..9b6f694e 100644
--- a/src/Acmebot.App/Program.cs
+++ b/src/Acmebot.App/Program.cs
@@ -47,7 +47,8 @@
 // Add Options
 builder.Services.AddOptions<AcmebotOptions>()
        .Bind(builder.Configuration.GetSection("Acmebot"))
-       .ValidateDataAnnotations();
+       .ValidateDataAnnotations()
+       .ValidateOnStart();
 
 builder.Services.AddWebhookOptions(builder.Configuration.GetSection("Acmebot:Webhook"));