diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b95e3d..0dac2bf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+# 1.9.1 (15.07.2025)
+- [refactor: Refactor client to meet the needs of the implementation to be performed](https://github.com/kommitters/bas/pull/149)
+
 # 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)
 
diff --git a/lib/bas/version.rb b/lib/bas/version.rb
index 7520da1..1ad2974 100644
--- a/lib/bas/version.rb
+++ b/lib/bas/version.rb
@@ -2,5 +2,5 @@
 
 module Bas
   # Gem version
-  VERSION = "1.9.0"
+  VERSION = "1.9.1"
 end