diff --git a/lib/localhost/authority.rb b/lib/localhost/authority.rb
index b9ea3d0..806d2d5 100644
--- a/lib/localhost/authority.rb
+++ b/lib/localhost/authority.rb
@@ -119,7 +119,7 @@ def certificate
 				
 				certificate.public_key = self.key.public_key
 				
-				certificate.serial = 1
+				certificate.serial = Time.now.to_i
 				certificate.version = 2
 				
 				certificate.not_before = Time.now