diff --git a/yb-book.dtx b/yb-book.dtx
index 03e97bf..cbade8e 100644
--- a/yb-book.dtx
+++ b/yb-book.dtx
@@ -50,7 +50,7 @@
 %<class>\NeedsTeXFormat{LaTeX2e}
 %<class>\ProvidesClass{yb-book}
 %<*class>
-[0000-00-000 0.0.0 YB Branded Book Style]
+[0000-00-00 0.0.0 YB Branded Book Style]
 %</class>
 %<*driver>
 \documentclass{ltxdoc}