diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4cd686ee..62072144 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required (VERSION 3.3)
 list(INSERT CMAKE_MODULE_PATH 0 "${CMAKE_SOURCE_DIR}/cmake")
 include(VersioningUtils)
 
-set_project_version(0 9 1)
+set_project_version(0 9 90)
 
 # Before making a release, the LT_VERSION string should be modified.
 # The string is of the form C:R:A.
@@ -12,7 +12,7 @@ set_project_version(0 9 1)
 # - If binary compatibility has been broken (eg removed or changed interfaces)
 #   change to C+1:0:0
 # - If the interface is the same as the previous version, change to C:R+1:A
-calculate_library_versions_from_libtool_triple(COGCORE 5 0 4)
+calculate_library_versions_from_libtool_triple(COGCORE 5 1 4)
 
 project(cog VERSION "${PROJECT_VERSION}" LANGUAGES C)
 include(DistTargets)
diff --git a/NEWS b/NEWS
index c8ae5a0c..7b60329d 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,12 @@
+======================
+0.9.90 - April 1, 2021
+======================
+
+- Support building documentation for the Cog core library using gi-docgen.
+- gtk4: Added mew "gtk4" platform module, which works on Wayland and uses
+  GTK4 to render web content into a GtkGLArea and provides a minimal yet
+  usable user interface
+
 ======================
 0.9.1 - March 16, 2021
 ======================