diff --git a/CHANGELOG.md b/CHANGELOG.md
index 18bc2a9438..eaab659696 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ are related to the items below. If there is no issue or pull
 request related to the change, then we may provide the commit.
 
 This is not a comprehensive list of changes but rather a hand-curated collection of the more notable ones. For a comprehensive history, see the [OpenSim Core GitHub repo](https://github.com/opensim-org/opensim-core).
+v4.3
+====
 
 v4.2
 ====
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3bf069393a..e55ba2555d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,7 +28,7 @@ include(FeatureSummary)
 # OpenSim version.
 # ----------------
 set(OPENSIM_MAJOR_VERSION 4)
-set(OPENSIM_MINOR_VERSION 2)
+set(OPENSIM_MINOR_VERSION 3)
 set(OPENSIM_PATCH_VERSION 0)
 
 # Don't include the patch version if it is 0.