diff --git a/CHANGELOG.md b/CHANGELOG.md
index c9f531f..644ad94 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.9.1] — 2026-03-24
+
+### Changed
+- **CHANGELOG** — added missing Tier 4–6 feature entries (composite secrets, approvals, JIT, exec, scanner, linter, memory, context, governance, scopes, rotation, CI validation, audit export) to the v0.9.0 record.
+- **Web landing site** — added 11 feature cards, 3 MCP tool groups (15 tools), 8 architecture modules; updated tool count from 31 to 44 and feature count from 13 to 24.
+- **Web changelog** — synced with CHANGELOG.md.
+- **Stats** — removed Tiers and Platforms cards; kept MCP Tools and Quantum Features.
+
 ## [0.9.0] — 2026-03-22
 
 ### Added
diff --git a/package.json b/package.json
index fb0ce0b..37b558f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@i4ctime/q-ring",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "mcpName": "io.github.I4cTime/q-ring",
   "description": "Quantum keyring for AI coding tools — Cursor, Kiro, Claude Code. Secrets, superposition, entanglement, MCP.",
   "type": "module",
diff --git a/server.json b/server.json
index a18a9e7..899b11f 100644
--- a/server.json
+++ b/server.json
@@ -6,12 +6,12 @@
     "url": "https://github.com/I4cTime/quantum_ring",
     "source": "github"
   },
-  "version": "0.9.0",
+  "version": "0.9.1",
   "packages": [
     {
       "registryType": "npm",
       "identifier": "@i4ctime/q-ring",
-      "version": "0.9.0",
+      "version": "0.9.1",
       "transport": {
         "type": "stdio"
       }
diff --git a/web/app/changelog/page.tsx b/web/app/changelog/page.tsx
index 1b43a72..d42bfda 100644
--- a/web/app/changelog/page.tsx
+++ b/web/app/changelog/page.tsx
@@ -16,6 +16,16 @@ interface ChangelogEntry {
 }
 
 const changelog: ChangelogEntry[] = [
+  {
+    version: "0.9.1",
+    date: "2026-03-24",
+    highlights: [
+      { type: "changed", text: "CHANGELOG — added missing Tier 4–6 feature entries to the v0.9.0 record" },
+      { type: "changed", text: "Web landing site — added 11 feature cards, 3 MCP tool groups (15 tools), 8 architecture modules; updated counts" },
+      { type: "changed", text: "Web changelog — synced with CHANGELOG.md" },
+      { type: "changed", text: "Stats — removed Tiers and Platforms cards; kept MCP Tools and Quantum Features" },
+    ],
+  },
   {
     version: "0.9.0",
     date: "2026-03-22",
diff --git a/web/components/Footer.tsx b/web/components/Footer.tsx
index 85091b4..aa0bfc7 100644
--- a/web/components/Footer.tsx
+++ b/web/components/Footer.tsx
@@ -14,7 +14,7 @@ export default function Footer() {
             height={24}
           />{" "}
           q-ring
-          <span className="text-xs text-text-dim font-normal ml-2">v0.9.0</span>
+          <span className="text-xs text-text-dim font-normal ml-2">v0.9.1</span>
         </div>
         <div className="flex gap-6 text-sm">
           <Link href="/docs" className="text-text-secondary hover:text-accent transition-colors">