diff --git a/CHANGELOG.md b/CHANGELOG.md
index 05c9b71b0f..6113dd0156 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## 3.9.0-rc.0 / 2025-12-18
+## 3.9.0 / 2026-01-06
 
 - [CHANGE] Native Histograms are no longer experimental! Make the `native-histogram` feature flag a no-op. Use `scrape_native_histograms` config option instead. #17528
 - [CHANGE] API: Add maximum limit of 10,000 sets of statistics to TSDB status endpoint. #17647
diff --git a/VERSION b/VERSION
index 44fc2364a9..a5c4c76339 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.9.0-rc.0
+3.9.0
diff --git a/web/ui/mantine-ui/package.json b/web/ui/mantine-ui/package.json
index 7958d5db91..3ee4c6c48c 100644
--- a/web/ui/mantine-ui/package.json
+++ b/web/ui/mantine-ui/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@prometheus-io/mantine-ui",
   "private": true,
-  "version": "0.309.0-rc.0",
+  "version": "0.309.0",
   "type": "module",
   "scripts": {
     "start": "vite",
@@ -28,7 +28,7 @@
     "@microsoft/fetch-event-source": "^2.0.1",
     "@nexucis/fuzzy": "^0.5.1",
     "@nexucis/kvsearch": "^0.9.1",
-    "@prometheus-io/codemirror-promql": "0.309.0-rc.0",
+    "@prometheus-io/codemirror-promql": "0.309.0",
     "@reduxjs/toolkit": "^2.10.1",
     "@tabler/icons-react": "^3.35.0",
     "@tanstack/react-query": "^5.90.7",
diff --git a/web/ui/module/codemirror-promql/package.json b/web/ui/module/codemirror-promql/package.json
index 6ad2116497..227dc67ed6 100644
--- a/web/ui/module/codemirror-promql/package.json
+++ b/web/ui/module/codemirror-promql/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@prometheus-io/codemirror-promql",
-  "version": "0.309.0-rc.0",
+  "version": "0.309.0",
   "description": "a CodeMirror mode for the PromQL language",
   "types": "dist/esm/index.d.ts",
   "module": "dist/esm/index.js",
@@ -29,7 +29,7 @@
   },
   "homepage": "https://github.com/prometheus/prometheus/blob/main/web/ui/module/codemirror-promql/README.md",
   "dependencies": {
-    "@prometheus-io/lezer-promql": "0.309.0-rc.0",
+    "@prometheus-io/lezer-promql": "0.309.0",
     "lru-cache": "^11.2.2"
   },
   "devDependencies": {
diff --git a/web/ui/module/lezer-promql/package.json b/web/ui/module/lezer-promql/package.json
index d83e1a6488..e1cf0ad67b 100644
--- a/web/ui/module/lezer-promql/package.json
+++ b/web/ui/module/lezer-promql/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@prometheus-io/lezer-promql",
-  "version": "0.309.0-rc.0",
+  "version": "0.309.0",
   "description": "lezer-based PromQL grammar",
   "main": "dist/index.cjs",
   "type": "module",
diff --git a/web/ui/package-lock.json b/web/ui/package-lock.json
index 23ae580c20..c52491732d 100644
--- a/web/ui/package-lock.json
+++ b/web/ui/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "prometheus-io",
-  "version": "0.309.0-rc.0",
+  "version": "0.309.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "prometheus-io",
-      "version": "0.309.0-rc.0",
+      "version": "0.309.0",
       "workspaces": [
         "mantine-ui",
         "module/*"
@@ -24,7 +24,7 @@
     },
     "mantine-ui": {
       "name": "@prometheus-io/mantine-ui",
-      "version": "0.309.0-rc.0",
+      "version": "0.309.0",
       "dependencies": {
         "@codemirror/autocomplete": "^6.19.1",
         "@codemirror/language": "^6.11.3",
@@ -42,7 +42,7 @@
         "@microsoft/fetch-event-source": "^2.0.1",
         "@nexucis/fuzzy": "^0.5.1",
         "@nexucis/kvsearch": "^0.9.1",
-        "@prometheus-io/codemirror-promql": "0.309.0-rc.0",
+        "@prometheus-io/codemirror-promql": "0.309.0",
         "@reduxjs/toolkit": "^2.10.1",
         "@tabler/icons-react": "^3.35.0",
         "@tanstack/react-query": "^5.90.7",
@@ -88,10 +88,10 @@
     },
     "module/codemirror-promql": {
       "name": "@prometheus-io/codemirror-promql",
-      "version": "0.309.0-rc.0",
+      "version": "0.309.0",
       "license": "Apache-2.0",
       "dependencies": {
-        "@prometheus-io/lezer-promql": "0.309.0-rc.0",
+        "@prometheus-io/lezer-promql": "0.309.0",
         "lru-cache": "^11.2.2"
       },
       "devDependencies": {
@@ -121,7 +121,7 @@
     },
     "module/lezer-promql": {
       "name": "@prometheus-io/lezer-promql",
-      "version": "0.309.0-rc.0",
+      "version": "0.309.0",
       "license": "Apache-2.0",
       "devDependencies": {
         "@lezer/generator": "^1.8.0",
diff --git a/web/ui/package.json b/web/ui/package.json
index dd7d25628a..0f054c34a7 100644
--- a/web/ui/package.json
+++ b/web/ui/package.json
@@ -1,7 +1,7 @@
 {
   "name": "prometheus-io",
   "description": "Monorepo for the Prometheus UI",
-  "version": "0.309.0-rc.0",
+  "version": "0.309.0",
   "private": true,
   "scripts": {
     "build": "bash build_ui.sh --all",