diff --git a/CHANGELOG.md b/CHANGELOG.md
index e244bc1b..1be6c620 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,8 @@ All notable changes to this project will be documented in this file. The format
 
 ## [Unreleased]
 
+## [9.0.0] - 2024-09-06
+
 ### Added
 - Add `Region.astype(dtype=None)` to copy and cast the region arrays to a specified type.
 - Add `Field(..., dtype=None)` to cast the array with field values to a specified type.
diff --git a/src/felupe/__about__.py b/src/felupe/__about__.py
index 5106875f..6dcf770e 100644
--- a/src/felupe/__about__.py
+++ b/src/felupe/__about__.py
@@ -1 +1 @@
-__version__ = "9.0.0-dev"
+__version__ = "9.0.0"