diff --git a/CHANGELOG.md b/CHANGELOG.md
index 60caf5d..d5c869e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 3.0.0-alpha.9 (Aug 10, 2024)
+
+- Add `polliwog.segment.is_point_on_line_segment()`
+- `Polyline.sliced_at_points()`: Avoid inserting degenerate segments
+
+
 ## 3.0.0-alpha.8 (Jan 18, 2023)
 
 - Support NumPy 1.24+
diff --git a/pyproject.toml b/pyproject.toml
index 34b3b29..3d6fd74 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "polliwog"
-version = "3.0.0-alpha.8"
+version = "3.0.0-alpha.9"
 description = "2D and 3D computational geometry library"
 authors = ["Paul Melnikow <github@paulmelnikow.com>", "Metabolize, Body Labs, and other contributors"]
 license = "BSD-2-Clause"