diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ce0f81..c1993d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## 0.9.0
 - Added `--topology` historical surface topology analysis, grouping archive evidence by host/path with observed schemes, normalized URL variants, parameter unions and deterministic parameter-set variants
 - Added `--cooccurrence` to report unordered parameter pairs observed together, with normalized URL, route, capture and first/last-seen evidence
 - Exposed surface topology and parameter co-occurrence in the local web UI using the shared historical-analysis core
diff --git a/debian/changelog b/debian/changelog
index eac2b71..1e91b3c 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,16 @@
+wayparam (0.9.0-1) noble; urgency=medium
+
+  * New upstream release.
+  * Add Surface Topology Intelligence grouped by archived host/path structure.
+  * Report deterministic parameter-set variants with URL/capture counts and
+    first/last-seen evidence.
+  * Add parameter co-occurrence analysis with route, URL and capture counts.
+  * Expose topology and co-occurrence views in the local web UI.
+  * Keep structural and co-occurrence conclusions explicitly scoped to
+    archive-index evidence without vulnerability or exploitability scoring.
+
+ -- Aleff <alessandro.greco.1@protonmail.com>  Mon, 21 Sep 2026 16:48:00 +0200
+
 wayparam (0.8.0-1) noble; urgency=medium
 
   * New upstream release.
diff --git a/docs/packaging-readiness.md b/docs/packaging-readiness.md
index 57639ff..d553043 100644
--- a/docs/packaging-readiness.md
+++ b/docs/packaging-readiness.md
@@ -120,10 +120,10 @@ mis-split would otherwise pass unnoticed.
 ### 3a. `.deb` attached to the GitHub Release (already automated)
 
 ```bash
-wget https://github.com/aleff-github/wayparam/releases/latest/download/wayparam_0.8.0-1_all.deb
-sudo apt install ./wayparam_0.8.0-1_all.deb
+wget https://github.com/aleff-github/wayparam/releases/latest/download/wayparam_0.9.0-1_all.deb
+sudo apt install ./wayparam_0.9.0-1_all.deb
 # optional, for the web interface:
-sudo apt install ./wayparam-gui_0.8.0-1_all.deb
+sudo apt install ./wayparam-gui_0.9.0-1_all.deb
 ```
 
 No infrastructure needed, but users get no automatic updates.
@@ -140,11 +140,11 @@ with updates through the normal apt upgrade path. Ubuntu only.
 
    ```bash
    ./scripts/build-deb.sh --source
-   dput ppa:<your-launchpad-user>/wayparam ../wayparam_0.8.0-1_source.changes
+   dput ppa:<your-launchpad-user>/wayparam ../wayparam_0.9.0-1_source.changes
    ```
 
 4. For extra series, rebuild with the series name changed in `debian/changelog`
-   (or use `backportpackage`) and bump the revision, e.g. `0.8.0-1~noble1`.
+   (or use `backportpackage`) and bump the revision, e.g. `0.9.0-1~noble1`.
 
 ### 3c. Debian / Kali proper
 
diff --git a/man/wayparam-gui.1 b/man/wayparam-gui.1
index 0eb5174..05607bf 100644
--- a/man/wayparam-gui.1
+++ b/man/wayparam-gui.1
@@ -1,4 +1,4 @@
-.TH WAYPARAM-GUI 1 "September 2026" "wayparam 0.8.0" "User Commands"
+.TH WAYPARAM-GUI 1 "September 2026" "wayparam 0.9.0" "User Commands"
 .SH NAME
 wayparam\-gui \- local web interface for wayparam
 .SH SYNOPSIS
diff --git a/man/wayparam.1 b/man/wayparam.1
index 20e2167..ca1d746 100644
--- a/man/wayparam.1
+++ b/man/wayparam.1
@@ -1,4 +1,4 @@
-.TH WAYPARAM 1 "September 2026" "wayparam 0.8.0" "User Commands"
+.TH WAYPARAM 1 "September 2026" "wayparam 0.9.0" "User Commands"
 .SH NAME
 wayparam \- fetch and normalize parameterized URLs from public web archive indexes
 .SH SYNOPSIS
diff --git a/pyproject.toml b/pyproject.toml
index 7551f2f..07387b8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "wayparam"
-version = "0.8.0"
+version = "0.9.0"
 description = "Fetch and normalize parameterized URLs from public web archive indexes (OSINT-friendly)."
 readme = "README.md"
 requires-python = ">=3.9"
diff --git a/src/wayparam/__init__.py b/src/wayparam/__init__.py
index 7c5b75d..20eeeaf 100644
--- a/src/wayparam/__init__.py
+++ b/src/wayparam/__init__.py
@@ -1,4 +1,4 @@
 # SPDX-License-Identifier: GPL-3.0
 
 __all__ = ["__version__"]
-__version__ = "0.8.0"
+__version__ = "0.9.0"