diff --git a/README.adoc b/README.adoc
index f4e44bf..67a6d13 100644
--- a/README.adoc
+++ b/README.adoc
@@ -1,6 +1,5 @@
 = {project-name}: A _native_ EPUB3 converter for AsciiDoc
 Dan Allen <https://github.com/mojavelinux[@mojavelinux]>; Sarah White <https://github.com/graphitefriction[@graphitefriction]>
-v2.1.3, 2024-05-12
 :project-name: Asciidoctor EPUB3
 :project-handle: asciidoctor-epub3
 :uri-project: https://github.com/asciidoctor/{project-handle}
diff --git a/lib/asciidoctor-epub3/version.rb b/lib/asciidoctor-epub3/version.rb
index 46c3742..45699eb 100644
--- a/lib/asciidoctor-epub3/version.rb
+++ b/lib/asciidoctor-epub3/version.rb
@@ -2,6 +2,6 @@
 
 module Asciidoctor
   module Epub3
-    VERSION = '2.1.3'
+    VERSION = '2.1.4.dev'
   end
 end