diff --git a/configure.ac b/configure.ac
index d0075fbd65..7eec1e684c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl Process with autoconf to generate configure script   -*- sh -*-
 
-AC_INIT([LyX],[2.4.2-1],[lyx-devel@lists.lyx.org],[lyx])
+AC_INIT([LyX],[2.4.2.1],[lyx-devel@lists.lyx.org],[lyx])
 AC_PRESERVE_HELP_ORDER
 # Use ISO format only. The frontend needs to parse this
 AC_SUBST(LYX_DATE, ["2024-09-24"])