diff --git a/configure.ac b/configure.ac
index eec0c7fbd9..43b7fb41fb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,11 +11,11 @@ AC_PREREQ(2.54)
 
 m4_define([gimp_major_version], [2])
 m4_define([gimp_minor_version], [99])
-m4_define([gimp_micro_version], [3])
+m4_define([gimp_micro_version], [4])
 m4_define([gimp_real_version],
           [gimp_major_version.gimp_minor_version.gimp_micro_version])
 m4_define([gimp_version], [gimp_real_version])
-m4_define([gimp_interface_age], [3])
+m4_define([gimp_interface_age], [4])
 m4_define([gimp_binary_age],
           [m4_eval(100 * gimp_minor_version + gimp_micro_version)])
 
diff --git a/meson.build b/meson.build
index bdd3f8b677..517853c9d2 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project('gimp',
   'c', 'cpp',
-  version: '2.99.3',
+  version: '2.99.4',
   meson_version: '>=0.50.0',
   default_options: [
     'cpp_std=gnu++14',