diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3e120926..9f0646ae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ list(INSERT CMAKE_MODULE_PATH 0 "${CMAKE_SOURCE_DIR}/cmake")
 include(VersioningUtils)
 include(GNUInstallDirs)
 
-set_project_version(0 3 91)
+set_project_version(0 4 0)
 
 # Before making a release, the LT_VERSION string should be modified.
 # The string is of the form C:R:A.
@@ -13,7 +13,7 @@ set_project_version(0 3 91)
 # - 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 1 0 0)
+calculate_library_versions_from_libtool_triple(COGCORE 1 1 0)
 
 project(cog VERSION "${PROJECT_VERSION}" LANGUAGES C)
 include(DistTargets)
diff --git a/NEWS b/NEWS
index 60e36900..9815d484 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,9 @@
+==========================
+0.4.0 - September 20, 2019
+==========================
+
+- Avoid a deprecation warning when building with GLib 2.62.
+
 ===========================
 0.3.91 - September 16, 2019
 ===========================