diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b23a97..010c977 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,29 @@
 # Release notes
 
+## Version 2026.3.0, - 2026-09-10
+
+### Added
+- `PowderPatternBackgroundHist` for a fixed background histogram with a
+  refinable scale factor (#94 @clemisch)
+- `ReflectionProfilePseudoVoigtTCH`, implementing the Thompson-Cox-Hastings
+  pseudo-Voigt profile (#97 @clemisch)
+- optional Rwp convergence threshold and per-cycle Rw history for
+  `LSQNumObj::Refine()` (#90 @clemisch, #91 @clemisch)
+- `RefinableParProxy` for locally named aliases of refinable parameters
+  (#78 @vincefn)
+
+### Changed
+- sync objcryst submodule to upstream `vincefn/objcryst` commit `30fc8df`
+- allow SCons build-command verbosity to be configured (#32 @clemisch)
+- allow the target CPU passed to `-march` to be configured for fast builds
+  (#33 @clemisch)
+- evaluate Chi2 and Rwp convergence thresholds using the absolute change
+  (#96 @clemisch)
+
+### Fixed
+- anisotropic pseudo-Voigt profile construction (#93 @clemisch)
+- buffer overflow risk in `MonteCarloObj` XML autosave filenames (#89 @vincefn)
+
 ## Version 2026.2.0,  - 2026-08-07
 
 ### Changed
diff --git a/site_scons/fallback_version.py b/site_scons/fallback_version.py
index 6f20786..2499647 100644
--- a/site_scons/fallback_version.py
+++ b/site_scons/fallback_version.py
@@ -7,4 +7,4 @@
 Update FALLBACK_VERSION when tagging a new release.
 '''
 
-FALLBACK_VERSION = '2026.2.0.post0'
+FALLBACK_VERSION = '2026.3.0.post0'
diff --git a/src/objcryst b/src/objcryst
index 90a3afc..30fc8df 160000
--- a/src/objcryst
+++ b/src/objcryst
@@ -1 +1 @@
-Subproject commit 90a3afca1eaa08078e4fdfad2b7968e05e21a48f
+Subproject commit 30fc8df2db6c42480e21ec07edef2deea7d5e3ef