diff --git a/pyproject.toml b/pyproject.toml
index 419c933..84cdb69 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "hubble-satnet-decoder"
-version = "1.2.0"
+version = "1.2.1"
 requires-python = ">=3.10"
 authors = [
   { name = "Hubble Network" },
diff --git a/release-notes.md b/release-notes.md
index 92aa175..b7f33d0 100644
--- a/release-notes.md
+++ b/release-notes.md
@@ -1,9 +1,4 @@
-## [1.1.12] - 2026-06-04
-
-### Fixed
-- Fix refined time sample index not being returned
+## [1.2.1] - 2026-08-31
 
 ### Changed
-- Synth_res values for TI (336 -> 366.2119) and Silabs (444 -> 296)
-- Removed half symbol offset from v1 data symbols
-- Update channel spacing constant
+- Synth_res value for Silabs (296 -> 297.546386719)