diff --git a/NEWS b/NEWS
index 5ee8ecc6..6de34bcf 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,19 @@
+Overview of changes in Sysprof 3.21.91
+======================================
+
+Sysprof 3.21.91 is here with a few changes as we stabilize for 3.22.
+
+ * Allow collapsing the callgraph tree with Left arrow.
+ * Add a full barrier before writing data_tail as suggested by
+   Perf kernel documentation. (Ray Strode)
+ * Support for additional architectures has been enabled by the use
+   of C11 atomics.
+ * Require -std=gnu11 for stdatomic.h
+ * Correct gettext domain for translation files (Kalev Lember)
+
+If you have fun and interesting architectures, please give them a try!
+
+
 Overview of changes in Sysprof 3.21.90
 ======================================
 
diff --git a/configure.ac b/configure.ac
index ca791433..1efe99d8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,7 +6,7 @@ dnl Define Versioning Information
 dnl ***********************************************************************
 m4_define([major_version],[3])
 m4_define([minor_version],[21])
-m4_define([micro_version],[90])
+m4_define([micro_version],[91])
 m4_define([package_version],[major_version.minor_version.micro_version])
 m4_define([bug_report_url],[https://bugzilla.gnome.org/enter_bug.cgi?product=sysprof])
 m4_define([api_version],[2])
@@ -112,7 +112,7 @@ dnl ***********************************************************************
 dnl Check for required packages
 dnl ***********************************************************************
 m4_define([glib_required_version], [2.44.0])
-m4_define([gtk_required_version], [3.21.3])
+m4_define([gtk_required_version], [3.21.4])
 m4_define([systemd_required_version], [222])
 
 PKG_CHECK_MODULES(GIO,