diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7401563..72b7c0d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,42 @@
+## v0.53.0 (2025-12-19)
+
+### Feat
+
+- add Alembic database migration system
+- make chunk modal title clickable link to documents
+- add native Plotly hover styling for clickable points
+- add click interactivity to Plotly 3D scatter chart
+- improve chunk viewer with fixed navigation and markdown rendering
+- **astrolabe**: enable multi-select for document types and refactor PDF viewer
+- **auth**: implement refresh token rotation for Nextcloud OIDC
+- **astrolabe**: enhance unified search and add webhook management
+- **astrolabe**: add webhook management UI to admin settings
+- **astrolabe**: add OAuth token refresh and webhook presets
+- **search**: add file_path metadata and chunk offsets to search results
+- **astrolabe**: use proper icons and thumbnails in unified search
+- **astrolabe**: add admin search settings and enhanced UI
+- **astrolabe**: add unified search provider with clickable file links
+- **astrolabe**: add 3D PCA visualization for semantic search
+- **astrolabe**: add Nextcloud PHP app for MCP server management
+- **vector-sync**: enable background sync in OAuth mode
+
+### Fix
+
+- **security**: address critical security issues from PR #401 code review
+- **oauth**: enable PKCE for all clients and add token_broker to oauth_context
+- **astrolabe**: revert invalid files_pdfviewer URL for file links
+- resolve type checking warnings for CI
+- move Alembic to package submodule for Docker compatibility
+- update unified search results to match chunk viz display
+- **astrolabe**: handle OAuth refresh token rotation
+- address critical code review issues (4 fixes)
+- resolve CI linting issues for Astroglobe
+
+### Refactor
+
+- **astrolabe**: extract PDF viewer to dedicated component
+- **astrolabe**: reframe UI as semantic search service
+
 ## v0.52.1 (2025-12-13)
 
 ### Perf
diff --git a/charts/nextcloud-mcp-server/Chart.yaml b/charts/nextcloud-mcp-server/Chart.yaml
index a8efe52..477b100 100644
--- a/charts/nextcloud-mcp-server/Chart.yaml
+++ b/charts/nextcloud-mcp-server/Chart.yaml
@@ -2,8 +2,8 @@ apiVersion: v2
 name: nextcloud-mcp-server
 description: A Helm chart for Nextcloud MCP Server - enables AI assistants to interact with Nextcloud
 type: application
-version: 0.52.1
-appVersion: "0.52.1"
+version: 0.53.0
+appVersion: "0.53.0"
 keywords:
   - nextcloud
   - mcp
diff --git a/pyproject.toml b/pyproject.toml
index 0e403f4..60b728b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "nextcloud-mcp-server"
-version = "0.52.1"
+version = "0.53.0"
 description = "Model Context Protocol (MCP) server for Nextcloud integration - enables AI assistants to interact with Nextcloud data"
 authors = [
     {name = "Chris Coutinho", email = "chris@coutinho.io"}
diff --git a/uv.lock b/uv.lock
index c5c2ef5..9e09847 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1988,7 +1988,7 @@ wheels = [
 
 [[package]]
 name = "nextcloud-mcp-server"
-version = "0.52.1"
+version = "0.53.0"
 source = { editable = "." }
 dependencies = [
     { name = "aiosqlite" },