diff --git a/lib/webpush/request.rb b/lib/webpush/request.rb
index d90a01f..f29ea69 100644
--- a/lib/webpush/request.rb
+++ b/lib/webpush/request.rb
@@ -112,7 +112,7 @@ def audience
     end
 
     def expiration
-      @vapid_options.fetch(:expiration, 24 * 60 * 60)
+      @vapid_options.fetch(:expiration, 12 * 60 * 60)
     end
 
     def subject