diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0f81b3..8b95e3d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+# 1.9.0 (15.07.2025)
+- [feat: Implement client to perform process deployments and instance creation in Operaton via the REST API](https://github.com/kommitters/bas/pull/146)
+
 # 1.8.1 (08.07.2025)
 - [refactor: Refactor client for correct use of shared_storage](https://github.com/kommitters/bas/pull/144)
 
diff --git a/lib/bas/version.rb b/lib/bas/version.rb
index 28a75e0..7520da1 100644
--- a/lib/bas/version.rb
+++ b/lib/bas/version.rb
@@ -2,5 +2,5 @@
 
 module Bas
   # Gem version
-  VERSION = "1.8.1"
+  VERSION = "1.9.0"
 end