diff --git a/book/index.adoc b/book/index.adoc
index d960eff..a833483 100644
--- a/book/index.adoc
+++ b/book/index.adoc
@@ -13,7 +13,7 @@
 :pygments-linenums-mode: table
 :pygments-style: vs
 :revdate: {docdatetime}
-:revnumber: v0.0.1
+:revnumber: 0.0.1
 :revremark: Under development
 :sectlinks:
 :sectnums!: