diff --git a/configure.ac b/configure.ac
index 185f59297acb63e8318b9c31b275cce27fa97ac5..8fb5ad32d78f4c98d7628f557c1e9def2edb8890 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,7 +23,7 @@ dnl Process this file with autoconf to create configure.
 
 AC_PREREQ([2.60])
 # keep version in sync with meson.build
-AC_INIT([xorgproto], [2021.3],
+AC_INIT([xorgproto], [2021.4],
         [https://gitlab.freedesktop.org/xorg/proto/xorgproto/issues])
 AM_INIT_AUTOMAKE([foreign dist-bzip2])
 
diff --git a/meson.build b/meson.build
index f6ec73c54160234644429aece5e657f62f13a235..f260c25adac91a3d3f0e8b48b69f5be889d741b1 100644
--- a/meson.build
+++ b/meson.build
@@ -19,7 +19,7 @@
 # SOFTWARE.
 
 # keep version in sync with configure.ac
-project('xorgproto', 'c', license : 'MIT', version : '2021.3')
+project('xorgproto', 'c', license : 'MIT', version : '2021.4')
 cc = meson.get_compiler('c')
 
 pcs = [