diff --git a/configure.ac b/configure.ac
index 50bd9fdf..3d2146fe 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.50])
-AC_INIT([shairport-sync], [5.2-dev], [4265913+mikebrady@users.noreply.github.com])
+AC_INIT([shairport-sync], [5.3-dev], [4265913+mikebrady@users.noreply.github.com])
 : ${CFLAGS="-O3"}
 : ${CXXFLAGS="-O3"}
 AM_INIT_AUTOMAKE([subdir-objects])