diff --git a/doc/APIchanges b/doc/APIchanges
index 60f056b863..e36a01336c 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -2,6 +2,12 @@ The last version increases of all libraries were on 2024-03-07
 
 API changes, most recent first:
 
+2024-06-02 - xxxxxxxxxx - lavu 59.21.100 - channel_layout.h
+  Add AV_CHAN_SIDE_SURROUND_RIGHT and AV_CH_SIDE_SURROUND_LEFT.
+  Add AV_CHAN_SIDE_SURROUND_RIGHT and AV_CH_SIDE_SURROUND_RIGHT.
+  Add AV_CHAN_TOP_SURROUND_LEFT and AV_CH_TOP_SURROUND_LEFT.
+  Add AV_CHAN_TOP_SURROUND_RIGHT and AV_CH_TOP_SURROUND_RIGHT.
+
 2024-05-23 - xxxxxxxxxx - lavu 59.20.100 - channel_layout.h
   Add av_channel_layout_ambisonic_order().
 
diff --git a/libavutil/version.h b/libavutil/version.h
index 9c7146c228..9d08d56884 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -79,7 +79,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  59
-#define LIBAVUTIL_VERSION_MINOR  20
+#define LIBAVUTIL_VERSION_MINOR  21
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \