diff --git a/.gitmodules b/.gitmodules
index 7b38ba2..1d075ee 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "lib/data/0.1"]
 	path = lib/data/0.1
 	url = git@github.com:bugcrowd/methodology-taxonomy.git
+[submodule "lib/data/0.9"]
+	path = lib/data/0.9
+	url = git@github.com:bugcrowd/methodology-taxonomy.git
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 807e10d..1d06ef1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,18 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](http://semver.org/)
 
+## [0.9.0] - 2025-09-12
+
+### Added
+- New 0.9 submodule with latest methodology taxonomy (SHA: 2827e2ce4421c5deb032e90702cff509a9540a91)
+- Support for version-specific methodology access
+- Hardware Testing Methodology (available in 0.9 submodule)
+
+### Changed
+- Updated AI LLM Testing Methodology with new content and structure (in 0.9 submodule)
+- Updated API Testing Methodology with enhanced testing procedures (in 0.9 submodule)
+- Maintained 0.1 submodule for backward compatibility
+
 ## [0.8.0] - 2025-09-10
 
 ### Added
diff --git a/lib/bmt/version.rb b/lib/bmt/version.rb
index 66263c9..16979ac 100644
--- a/lib/bmt/version.rb
+++ b/lib/bmt/version.rb
@@ -1,3 +1,3 @@
 module Bmt
-  VERSION = '0.8.0'.freeze
+  VERSION = '0.9.0'.freeze
 end
diff --git a/lib/data/0.1 b/lib/data/0.1
index 2827e2c..f8aa588 160000
--- a/lib/data/0.1
+++ b/lib/data/0.1
@@ -1 +1 @@
-Subproject commit 2827e2ce4421c5deb032e90702cff509a9540a91
+Subproject commit f8aa5884da64ffc3d000126dff067cd7abde3b6a
diff --git a/lib/data/0.9 b/lib/data/0.9
new file mode 160000
index 0000000..2827e2c
--- /dev/null
+++ b/lib/data/0.9
@@ -0,0 +1 @@
+Subproject commit 2827e2ce4421c5deb032e90702cff509a9540a91